A great sensor bar with a few flawed extra features.
921526
First of all, I'll say that this is a far superior sensor bar to anything I'd gotten from Nintendo. The IR lights are very bright and make it much easier for the remotes to detect. For my purpose, I am reviewing it's functionality for PC. It is entirely powered by USB and has Bluetooth built into the sensor bar. It also uses the Toshiba bluetooth stack, which is required for Motion+ controllers. Installation was fairly simple.
The sensor bar uses a few different functions depending on how you are using it. The Wii Emulator mode works perfectly with Dolphin! I have used the mouse cursor mode to play some other lightgun style shooting games with mixed results. Functionality for those games are entirely based on how the game translates mouse sensitivity. I once attempted to play Minecraft using the different mouse/keyboard game modes. After spinning in circles for 10 minutes, I decided to leave that project for another day.
When using mouse mode in games that agree with it, I noticed that the cursor is always a bit high or low depending on where the sensor bar is in relation to the video screen. The only way to make it centered is to set the sensor bar directly in the middle of your TV or monitor, which obviously is not a reasonable idea. The Wii makes up for this adjustment by allowing you to select the offset, whether the bar is above or below the screen. On the other modes, the Dolphinbar does not have this offset option or any sort of means to calibrate or customize the controls. I contacted Mayflash support and they advised that they do not have any plans to fix this, which I found rather disappointing. Either way, it's functionality with the Dolphin emulator still made it well worth the investment to me.
2897066
The plastic housing of the sensor is closed by four machine screws interacting with four threaded metal inserts, which is good; but these screws have some sort of extra fine metric threads, which means it takes a lot of screwdriver turns to screw them out or in, and if you loose one, you are out of luck. (So don't even think about changing the battery out on the road).
The sensor's notification signal is in my setup received reliably over a distance of 600 ft and through the walls of the house.
The passive infrared sensor has almost too much sensitivity. At 20 ft from the driveway (dictated by terrain and vegetation) and the sensitivity set at "high", it may or may not be desirable to hear a signal when a person walks along, but it is somewhat of a nuisance to be alerted everytime a deer moves through the area. I'll set the sensitivity to "medium" next time I change the battery.
This brings up a little problem: the sensor does not have a power switch. When it is handled during battery change, it is constantly sending signals; and I'm concerned the little 9V battery may be half exhausted by the time its installation is completed and the sensor is mounted on its post.
The receiver has four channels, i.e. it can work with four sensors. A different audible alert can be assigned to each channel, and each channel has a honest-to-goodness output relais that can be used to switch all sorts of external electronics on or off. I use one channel relais to turn on temporarily a video monitor for a video surveillance camera.
2185983
My immediate impression is favorable.  It is a very basic unit but it does what I want.  I particularly like the ability to switch which reading, indoor or, outdoor, is in large numbers.  It is replacing a 12-year-old unit that finally expired, so I am confident that the outdoor sensor position is sheltered from the weather and undue sun, and can reach the indoor display.  It's probably just as well that it is sheltered, as the external sensor seems to have virtually no seal against the weather;  I'll watch out for this and if necessary update this review.  One particular and easily avoidable design defect is that the keyhole slot for wall mounting the display unit is ridiculously small, so it only accepts screws that are really too small for the job.
1837577
This sensor bar is great. The LEDs are very bright and will give you solid cursor movement in Wii games. They are arranged identically to the stock sensor bar, which means you can use remotes form far away or extreme angles. The case is a little bit flimsy but you won't be handling it much. The attached USB cable is much too short, you'll need an extension for virtually every setup.

The built in bluetooth receiver is excellent. It pairs with controllers faster than the Wii does, and it's always scanning, so you pick up a paired wii remote, hit A and it's ready to go in one second. Pressing and holding power turns the wii remote off. Which is fantastic and the way I wish wii remotes worked when connected to a wii.

The mouse and keyboard emulation work in Windows. The mouse is extremely jittery because the Wii remote is really only designed to simulate a cursor at 480p resolution. Even still, when I'm in Steam big picture mode and a game's launcher comes up, I don't have to get up and walk over to he keyboard and mouse. I can just grab my wii remote, tap A, it connects in half a second, then use the mouse emulation to hit "play". It's good enough for that usually.

Multimedia mode is nice and works well with Plex and other media players. The mouse movement is ugly but as long as targets are large, you'll hit them. Stick to the D-pad for navigation. Dedicated remotes work better here but it's a cool feature to have.

PC gaming mode is almost useless. The mouse emulation jitters terribly at anything higher than 800x600 resolution and, because it places the cursor onscreen using absolute coordinates, first person shooters or any game that takes mouse control will just panic and show the player constantly spinning until you point the wii remote away form the sensor bar. I usually have to completely turn off Wii remotes when playing PC games to prevent interference.

The best feature here is that the sensor bar works seamlessly with Dolphin, the Gamecube/Wii emulator. It's so exciting to be able to use Wii remotes hassle-free with Dolphin. No more endless pairing, going into the Wii remote settings, hitting refresh, waiting, pairing again, etc. You just turn on the remote and go, every single time, with up to 4 remotes. Playing 4-player games using Dolphin in a party-type setting is finally possible without someone getting bored or frustrated by the long setup. The Wii Motion Plus is supported and works with games like Skyward sword. I noticed a lot less lag and recalibration using Dolphin bar than my PC's built-in bluetooth. Speaker support won't cause input lag when using Dolphin Bar, like it does normally, but it still doesn't seem to work right. Audio crackles out of the wii remote speaker in bits and pieces. I'm not sure if the problem is with Dolphin or DolphinBar. Just leave it off.

The good:
Very fast pairing
Robust bluetooth connection
Functional PC mouse and keyboard emulation
Seamless Dolphin support
Supports up to 4 controllers
Replaces the Wii sensor bar too (plug it into the Wii's USB ports)
Inexpensive

The bad:
The cord is much too short
Wii remote speaker still doesn't work well

The ugly:
The mouse emulation causes most PC games to panic
4678763
I received my G1W as a Christmas gift December 2015. I've had it installed for about 8 months now and it has, overall, worked well.

The Good:
* Seems well built
* Easy to install
* Easy to set up
* Good low light sensor
* Battery has not yet fully drained itself before auto shutoff
* Automatic overwrite is a great feature

The Bad:
* Extreme temperature change causes the suction cup to lose it's grip on the windshield
* DOES NOT have "night vision". It has a very good low light sensor but that is NOT night vision
* No connection for a second video feed such as a rear facing camera

Overall, for the price, this little thing has been great. I wish it had a true Infrared night vision camera but the low light capability of the camera is sufficient for all but total darkness.
4734702
Worked well, made taking the sensor off a breeze
3485930
This product is decent (it works mostly as advertised). The big caveat is the sensor range. If you are placing this is any awkward place (such as stairs), or inside a light fixture where the sensor area is even slightly covered, you are asking too much from it.

This sensor socket works perfectly in open areas where the sensor area has clear and un-obstructed view of the area where people move. For the price paid though, it's enough. If you buy it, you can try it in your designated spot, and if it doesn't perform, just demote it to a location like the attic or the garage so you don't waste your purchase.
3038162
This unit is very well constructed and the design well thought out. I didn't like the metric screws as I needed more and they are expensive. Comes with all needed hardware. Instructions are complete but could be a little more clear on some items. UV sensor failed almost immediately and the company has yet to replace it. The most severe shortfall with the unit is the accuracy of the rainfall and wind sensors. The winds sensor seems to be the most inaccurate with the rainfall sensor not being all that far behind. The forecasting function actually works pretty well and the PC connectivity is icing on the cake. In this price range $250, I think it is hard to beat, if you can stand the readings being off a bit.
UPDATE: The company now tells me the some wind sensors have been reported bad. They claim I will receive one with the UV sensor but I haven't seen either one yet. The rainfall sensor agrees with a rain gauge, most of the time. The outside temperature sensor indicates temps correctly but gives some outlandish values for humidity. I need to talk to the company about that also. The rest of the review stands as is.
4105992
This was a great companion for the Lynx L5100 I bought. Replacing my old panel was very easy once I sorted out the wiring. A couple things to point out though, if you have sensors that are tied together it will not recognize the difference. To give an example; I had two doors that were spliced together, and when I would open either one the panel would report them as the same door. My solution was to run a new line and put each door on its own zone. I then reran to the other zones that were spliced together and seperated them to work the way I wanted them to. If I had multiple windows in a room, then I left them tied together.

When programming this to the keypad all I had to do was trip the sensor, and name then it.
648149
This weather station is great in so many ways and would be perfect is there was an outside temperature sensor
Pluses
1. Compact
2. Dimming large LED
3. Accurate indoor temp
4. Twin charging ports
Minus
1. Inaccurate outside temp. Don't know why this is even included since there is no sensor for outside temperature
4232520
The sensors are quite sensitive, they are good.

I wish, however that:

The motion sensor had an additional option for hanging them, such as an additional plate on a side of the sensor with holes for screws as well as on the back of the sensor. This would allow to attach the sensor not only to the wall of the house, but also to a tree facing the house door and windows, to a large table, to a lamp post in the yard, etc.
4178099
Had this installed by my contractor in the guest bath. This controls my light fixture with G9 halogen bulbs. The sensor works fine. My only gripe is that it turns off too soon in the auto mode within 30 seconds even though I am inside sitting on the throne. I have to wave to have it turn on again. As a solution, I keep it in auto mode only after 7 PM and off during the day. Otherwise, the sensor trips consistently every time I open the door ever so slightly. Plus it looks cool. Definitely worth the price I paid.
352949
Pricey, but nice set of extra sensors for your ecobee3
3170355
Overall I am very satisfied, however I do think that some of the instructions could have been more informative. For example, it's necessary to set up a Motion Zone if you want the motion sensor to work. And how to add Shared Users and what they had to do to complete the process. Perhaps I missed this detailed information but it wasn't obvious too me.
4036805
I've gone through a handful of different Wii sensor bars (Nyko wireless, original Nintendo, Nextronics USB) looking for something that will work from a seating distance of 12-14 ft, I had actually stopped playing games that required on screen Wii remote control because I didn't have a reliable sensor bar. I'm happy to say that I've found it here with the Power A Ultra Sensor bar. It works perfectly even at the lowest sensitivity setting on the Wii. I believe this is because it allows you to increase the distance between the LED clusters.

There are some negatives though.

There are 10 LEDs in this, considering it is an item that you're going to leave on for hours at a time that is going to go through AA batteries fast. So either use rechargeable batteries, or better yet replace the batteries with a DC power supply which is what I did (e.g. your run of the mill AC adapter or USB).

I presume a 6V supply is optimal since it uses four AA batteries in series, but I wasn't able to find one laying around the house. However 5V power supplies are extremely common considering how many products use USB which provides 5V. This is about the same voltage that would be supplied by a set of four rechargeables.

It took less than 5 minutes to get the sensor bar setup with the 5V adapter. How this is done is probably obvious, but I'll go ahead and list the steps.

1. Take your unplugged donor AC adapter/USB cable and cut off the connector then strip the wires.
2. Measure the voltages on these wires to make sure you get ~5V (mine was 5.2V with no load) and identify positive and negative wires.
3. Open the battery compartment on the sensor bar and solder the positive 5V wire to the + contact at the end of battery compartment, and the negative wire to the - contact at the other end of the battery compartment. (Note that you will no longer be able to use it with batteries)

That's it.

I leave the battery compartment open, it is on the bottom so isn't seen and has no functional effect. I'm sure you could do a cleaner setup while maintaining the ability to use batteries by drilling a hole and opening the case to connect directly to the wires in the sensor bar rather than the battery contacts, but I didn't feel it was worth the hassle.

I had a couple other critiques as well.

It would be nice to disable the 2 hour auto-shut off. The on LED is also exceptionally bright which is distracting, I've covered mine with tape. The battery compartment hatch is fragile and difficult to open, one of the tabs broke the first time I opened it, but I didn't want to use it anyway.

If they made a new model with these items changed as well as an integrated mini-USB connector to power it externally without the modifications that would be the perfect product.
4242156
The build quality is very impressive at such a price point and honestly looks a lot better than some very expensive ones out there. Installation was simple and straight forward, didn't even need the included instructions. One minor issue is that the sensor can be a bit quirky at times depending on the outside temperature. I find that in colder weather the sensitivity can fluctuate. With the same settings, I've had it turn on when I'm 30 feet away and then sometimes when I'm almost 5 feet away. Also we have very playful rabbit in the yard who comes around same time every night and hops around for an hour or so. Seems like there's no way to avoid the wildlife and depending on how many critters you have around, you may find this on most of the night.
4077492
Works almost as advertised but the sensing range seems a bit shorter than expected.  The timer/off feature works just fine and the sensor has the ability to be used in the accompanying weighted mount or allows itself to be hung on a wall by using two screws or nails (not included).  Price was great and I might buy another one.