Reliable but not fantastic...
586820
The usable light doesn't last anywhere near as long as the manufacturer states (about 5 mins max). Having said that I have used similar flashlights before and knew this to be the case before I bought this, so I'm semi happy with my purchase. I wanted something for absolute emergency and unfortunately this is the best there is at the moment!
3393102
Title pretty much says it all.  Great water mover, but not especially reliable.  The hose connection is particularly prone to failure (buy a spare with the pump) and tends to slide off under pressure (I finally screwed it on).  Although it's supposed to start automatically, mine has never been especially reliable, so I used two and hope for the best.
3887843
This works great and has been very reliable for over a year.
Have had to reset a few times... I think mostly due to provider issues.
4909357
Unpredictable is a good way to describe this item. I tested this item with my dash cam and a 10FT micro USB cable, and it would still go into mass storage mode about 50% of the time. I guess your mileage may vary just as one of the previous reviewers stated who also used a third party cable with this connector. I suppose my car just does not seem to like this adapter very much. If they had a 10FT charge only USB cord, I would have rather just purchased that one. 50% reliability is just not good enough to merit the price tag.
3869824
It worked well for a week or so, but a couple weeks later it would sporadically disconnect. It happened maybe once or twice a day, every day. I reset it and everything but it wasn't very reliable. I had to end up hardwiring from my basement instead.

It's okay if you don't mind occasional disconnections. But honestly I wouldn't use this again - I needed it for work use.
1719216
During the 21 months I've owned this timer, it worked just fine for my daily usage in the 12 of 18 months that it was functional, although it was annoying to ensure that I had turned it past 30 minutes in order to set the actual time I required.  It's been unreliable for the past three months, with the last month a totally bust.  So, basically a year of service.  (I travel frequently; hence, the specificity of the timeframe.)  I plan to try the "Winner" timer as tested by America's Test Kitchen, which looks to be about a dollar more for what seems to be a much more robust, easier to use, 3 timers in 1 design.
644882
It does do as advertised, but some receivers can't handle the weakened signal. Some of my receivers work fine, but one doesn't unless it has a full strength, unsplit signal.

As cheap as it is, it's worth having in your bag of tricks, but I wouldn't rely on it.
4605349
I have mixed opinions on this monitor...on one hand, it works pretty much "as advertised", and since it has all the typical Windows AND Mac keys on a single device, it's great for those of us that need to run both systems. Battery life is about the same as I get from an Apple Wireless keyboard, and I've had no trouble pairing with several different computers.

On the other hand, there are a few other issues that leave me less impressed. For one, the repeat rate seems a little erratic - sometimes it works as expected, but if you're a quick typist, sometimes it seems to get "stuck". But durability is my big complaint - after not even a year, the "A", "S", "D" and "E" have worn off completely (the keys still work fine, but they are now blank). I spend a lot of hours at the keyboard, but I've never seen another keyboard that just had the letters wear off.

Otherwise, this is a unique product - if you don't mind relabeling the keys with a Sharpie once in a while, it might be a good choice.
3411160
This one, and the Neewer equivalent, are ok, but I'll be replacing my third one. Each one has developed a short in the cord.

If you don't mind replacing these every couple of years, it will get the job done. When it starts working inconsistently, it's probably the cord.

I'll be upgrading to something a little better. The problem prohibited a time lapse last week. Not cool.
4380254
Works great - very accurate and good range.  Only downside is the quality isn't amazing - I've gone through 3 of them in 5 years.  I only keep buying them because there is just nothing that performs as well.
4551244
These don't seem to be very reliable.

I have had about 20% failure rate.  If you want cheap and don't mind throwing away one if five disks ( or using them for coasters ) spend a few more dollars for better quality.
1546793
Works for a while, not consistently reliable, particularly in inclement weather.  However, there really isn't anything much better on the market that I've used short of burying a sensor.
286521
For the price, it has it's uses...but it is very unreliable about working as it claims. It is low cost enough to keep it anyway, but don't recommend buying more than one until you see for yourself if you can even use it at all. It is barely useable, but it is not bad to have around for situation you see where it might be good to use in a pinch. What everyone says about it being a battery hog is true. 9-volt batteries are not that cheap to replace a couple times a week.
1540805
I have purchase 4 of these units.  3 or the 4 have failed after being in service for relatively short times.  On the plus side, they are easy to set up and when they work they work.  2 of the 3 failures resulted in the device being turned "on" when it was supposed to be off.  In all fairness, I am in an area where lightning is a factor, however I also use a competing product in the same building and have zero failures.  I can not recommend this product due to unreliable operation.  It does, however appear to meet published specifications.
1790565
Works just fine most days, every once in a while I get some static going through it and once every few weeks it will stop playing but it is somewhat reliable for the price. Plus I needed the right angle plugs, and there aren't many out there anymore!
905591
Purchased them in June 2013 and one battery had given up by Oct 2014 and the other one recently turned bad. I have been very careful with these batteries, and have taken sufficient precautions to prevent overcharging, never left them in the camera for long periods of time, and never drained them completely either. In fact, I would keep the batteries in rotation to make sure that each of them is getting used alongwith the OEM Nikon battery.  Some people might have a lower expectation from these batteries and maybe ok with the lifespan, however i expected more.
The charge capacity was very good initially and i never had any issue then.
Another issue is that these batteries cannot be charged in Nikon's charger for some odd reason. The car charger is certaily slow as expected and not a reliable source of power if you are a travel photogrpaher and plan to charge bateeries during road trips interspesed in your travel itinerary.
Overall, i am not pleased with their performance and won't recommend to anyone.
3512159
There seams to be some hits and misses with this clock.  Some have suggested that the newer models have been more reliable.  In any case I have bought 2 of them now and both are working fine at 2 months old.  In one of them I put a half dad battery to start and it is fine as well.
The design is nice, but not quite a five star product.