Decent quality for the money. Good temporary solution for people who don't plan to ride at night
344335
The front and rear lights attach very easily to the handle bar / seat post.

They are secure if installed correctly, and are simple to operate.

However, the lights are not going to make you easy to see and -- if you plan to be on your bicycle at night (especially on highly trafficked roads) -- I strongly recommend you purchase a much more powerful light system. It could save your life.

The rear (red) light has a button that requires very little force to press. It cycles through 3 presets: Full on, rapid blink, and one LED lighting up left to right.

The light seems bright enough to be seen from a short distance away. Given its location under the seatpost, I would not rely on this light to protect me from fast, heavy vehicles approaching quickly from a great distance. At a minimum, I would place this light on the rear of my helmet for greater visibility. With this rear light, I wouldn't ride my bike in the dark on a road with traffic going more than 30 mph. I would not feel safe.

The front (white) light allows me to see about 15 - 25 yards in front of the bike. The further I point the light forward, the more difficult it becomes to see directly in front of me.

It is simple to remove the front light and use it as a flash light. For this use it is excellent for a short distances.

On local streets, with a low speed limit, I think these are a good temporary solution, since I don't ride often in the dark. For those occasions when I get home later than planned, I have these lights to get me back safety.

Nonetheless, I am looking for a much more visible light that will help drivers see my bicycle in the dark. The consequences of being less than prominent in a driver's field of vision can be serious and permanent.
1184096
Pros:
- easy to install
- multiple blinking settings
- lights are very visible by cars
- good for price
Cons:
- buttons to change settings are not very responsive
- white light stopped changing settings within a day
- white light does not illuminate path as much as expected
- they were stolen off my bike within a day

Overall:
These are cheap lights as advertised by the price. They get most of the job done but they could lighten up the road a bit more. The multiple blinking settings is very useful especially for the red light to be detected by cars. If you're looking for a quick cheap bike light then these are the product for you; but, if you are looking for a long term bike light consider other products.
4503693
Decent light.
Not going to light a dark path
Lets cars know you're there.
1041976
These lights are decent quality lights, which use solar power during the day to charge a battery.  This means that they don't stay on all night (as the battery will wear down) and the brightness isn't as much as ones that are plugged in.  That being said, no problems yet.  I strung one up around my door area and another around my garage doors.

When the sun goes down, it senses no light and turn on automatically.  There are different settings (blink patterns) and they work pretty well.

They aren't great, but then I'm not giving any money to the electric company... so I have that going for me.
2420470
I use this bike as an aux helmet light when riding my dirtbike at night.  It's equipped with an aftermarket retrofit headlight that's there more for the rider to be seen, rather than for the rider to actually see (and it's pretty awful in that regard).

This light does the trick, though.  I've bought several Chinese LED lamps that, while not horrible, weren't particularly good either, and the best of the bunch always had an annoying separate battery pack with wires that I'd end up destroying running around the helmet/handlebars.  The best of the bunch, however, couldn't hold a candle(power) (ha!) to the Cygolite.  Nice, bright and even beam pattern with none of the hotspots that plague the other brands I've tried.  It seems pretty sturdy, the battery on the medium setting will last me all night, and it's easy to operate with gloves.

At times, I ride pretty at pretty high speeds through some narrow trails, and I have no problems with the light being cast.  It's not quite so wide as, say, a car headlight, but it's its equal in actual brightness.  I wish there were more of a yellow tint to the light rather than this very stark white light, but I'm probably in the minority on that one and it's a minor complaint anyway.

Riding a dirtbike, and wearing a dirtbike appropriate helmet, I had some issues mounting it with the included hardware.  The helmet hardware was a no-go and when I tried to offload the light to the bike itself, I couldn't find a place that would work except one spot on my handlebars, but the included clamp was too large in any case.  I did discover that this light will work with GoPro mounts, so I was able to use a GoPro adhesive helmet mount to paste it on the side of my lid.  I've also got the clip mount (the one that looks like a clothespin) standing by in case I want to use it on my handlebars.  Awesome.
1834121
Surprisingly bright and overall very good quality for the price.  The high setting output is easily comparable to an average automobile headlight. The low setting is best for most urban situations as the high setting can easily become an offensive weapon!  I only have two minor complaints. The first is that whenever the battery is connected to the headlight, the two control buttons on the back panel are always illuminated, causing continuous low-level battery drain.  My other complaint is that the headband mount is pretty useless, as it will not rise higher than shooting pretty much down at your feet. The heavy duty rubber band mounting system is cheesy but effective on handlebars.  That being said, I already gave my first one way to admirer, bought a second, and will soon purchase a third as a gift.
4567188
For the price, they are pretty decent. This is my second time purchasing these after losing some of my others. After a while, they tend to become a little temperamental, shutting off if you click them on with the battery at just the wrong angle. Considering the cheap price, that would normally lead me to give these a decent 4-star rating. However, my most recent purchase unexpectedly came with a handful of extra batteries! Definitely would recommend these cheap lights if you're looking for something to get the job done without needing to take a lot of abuse.
4289540
Works as intended, don't expect it to last long outside of house.
37571
Decent quality, not very comfortable.
But can't beat price.
1965207
These have been a good solution for my commuting bicycle at its price point; the batteries are common AAAs, the LEDs are bright and the illumination cycle is ideal. The silicone exterior is definitely more durable than what you'd expect from the product images, and is both secure and can be adjusted easily.

My only criticism is the illumination button - it's difficult to find by feel when wearing gloves, though you're generally only trying to find it at the start or end of your ride.
4114359
The illuminated spot is rather small because the beam is so focused, but for a cheap headlight it's what I expected.

The mount was able (barely!) to accommodate my large aluminum frame handlebars. The trick was to actually unscrew the clasp, wrap it around the handlebars, and then rescrew it in. No tools necessary.

Update, Sep 2013: I rode at night tonight and almost got hit twice. This light is NOT sufficient for attracting the attention of distracted drivers. I plan to immediately upgrade to a better headlight. Protecting your life is worth the $$.

Happy riding!
3556560
It was my fault for not reading the description carefully. I thought they were 400 lumens. No, they're 19 x 5 leds, so 95 lumens, so about as much as a small flashlight. Good enough for slow riding when you need to see a few yards ahead, but if you're riding on unlit roads and going at a good speed, you need more than this.

Cons:
Construction is flimsy, but it's what you'd expect from something in this price range.

Pros:
The mounting clamp works great. Secure, and easy to remove.
2672246
Bought for $29.95 in summer 2013, it barely lasted one year.  The Blinder 'mounts' to your bike using a rubber band-type mechanism which wraps around the seat post (you could place it elsewhere, but this generally maximizes visibility).  I live in New York where stray items on my bike have been lifted, so I would remove the light everyday -- if you are not parking your bike in public places, this may be unnecessary and you could therefore prolong the life of your light.  Essentially this daily attachment and removal creates a lot of wear and tear on that rubber portion and it just snapped and fell off my bike.

+'s:
* Puts out a very strong red light with pulsing or constant light modes.
* It's waterproof which is essential if you're ever biking in the rain.
* It's lightweight and compact.
* USB rechargeable means no wasting of money (or lead) on batteries.  I believe you can get about 15 hours of use in a single charge, which means you're fine charging every other week under decent bike commuting circumstances.

-'s;
* Not sturdy, as described above.

I was a big fan of this light, but an essential quality is it for actually stay on my bike and not disintegrate under relatively mild use.
4651520
There are just a few things that won't let this climb to a 5 star review. The quality of the rubber piece preventing the mirror from shaking around too much is rather poor and tears easily over time. The mirrors only adjust in one direction tiling up/down at the attachment point, you cannot rotate them to a better viewing angle. The lights facing backwards inside the mirrors are not quite bright enough to be seen during the day, which is disappointing if you need to let other motorists know you are turning while on a day cruise. At night these lights do a great job of attracting attention and since the stick out quite far from the bike they become a good addition to your safety. Last but not least the mounting hardware that comes with this kit is limited, so getting this up and running with all manner of bikes is going to be largely on you as the customer. I got these for my 2015 S1000RR and already managed to lose one the highway because the screws are not long enough for this bike's fairings. So heed this warning and get the proper bolt length to fir your machine and some washers to help the mirrors stay stable. You will need to tighten the screws at the pivot point to makes sure these don;t fold on you in the wind.
Beyond that these are fairly large and good looking mirrors that are most likely lighter than OEM integrated mirrors and mirror/turn signal combination most bikes have stock. These do not need extra resistors as I did not notice any super fast flashing, but results may vary with your machine. If you are running a lithium battery it is probably a good idea to check with the battery manufacturer if these will run okay or check the forums.

Happy riding!
4063469
It's a good product somewhat, but you get what you pay for. The light is NOT enough to light a walkway, but it's enough to sort of guide you down the path. It isn't intended to light a walkway, so the picture isn't exactly clear on that point.  Also, at the area the rods are used to stake it into the ground, the connecting area is about 1/2 inch and will snap easily if any pressure is applied (like, if a dog runs across it with a leash and any amount of pressure, which is what happened to mine).  I still really cannot complain over all as it's very reasonably priced.  I pulled these up and used them around my tent at a campsite and it was fantastic!  I prefer them for that use rather than my sidewalk since pulling them up every week to mow the grass is a little bit annoying for me.
2369989
Good for helping others to see you, but not great if you're trying to navigate the road / trails at night.
4426255
I bought this as a replacement for another (cheap) tail light that stopped working after one of many rides in the rain.
I didn't want anything fancy: just something to keep me safe for my evening commute.  No one has hit me yet.

I was pleasantly surprised at the battery life and the security of the attachment (at first I was wary).  Plus it's made it through a number of rainstorms without issue.  Operation is very simple: the easily located side button means I can reach back and turn it on and off if light conditions or road conditions change.

The strap to secure it on the bike was too short for affixing it my seat post-- but there are usually other options.  Overall it's a good light for the price.

Shipping was (as usual through Amazon) prompt.