weak mount for a good light
342281
Light is good, but mount is weak. Flimsy quick release function of fixture means it pops right off when you ride on the street.

I enjoyed my light for three days, and lost it when I was riding on a bumpy city street. I would not purchase this fixture again. I will look for something with a permanent mount.
3814356
Very disappointed with the light. The mount is barely adequate, could not get anything close to a tight fit, the light would move while riding and I would constantly need to reposition it while riding.  After using it for 4 rides it stopped working. I thought that I had left it on and ran the batteries down, but the batteries are still good. No amount of tinkering with the contact made any difference, it's dead as a doornail.
1389814
The actual light works just fine, it has two settings and the five LEDs which provide a good amount of light.  The problem is the bracket.  When I attached it to my bike it would not tighten enough and I had to constantly readjust it to keep it upright.  After a few weeks it broke off altogether, its half the price of other lights and ships directly from China, I'm not surprised.....
3033560
The light seems to be just fine.  However, I had a very difficult time mounting this on my helmet.  To get it to point where I wanted it, it had to be back at the midpoint of my helmet.  The strap was almost too short for this, and I had to stretch it more than I was hoping for.

Updated on 4/2/2010:  After using this for night riding outside of the city, the beam is really narrow and doesn't work well as a helmet light.  It probably helps to be seen and works to look at my shifters and speedometer, but I can't really look around with it.  This is disappointing since I bought it specifically for the helmet mount.  I guess you get what you pay for and I'll probably upgrade in the near future.
767713
Oh man... the flashlight MOUNT is okay pretty solid but the flashlight is just terrible, I would spend a few extra dollars and get a decent flashlight.
3460247
Pros:

Bright
Easy to mount
Easy To operate

Con:
Would not stay in position during operation
Tended to drift downward
3179905
Light source insufficient for most applications.
4446193
The front lights are pretty decent and allow for casual riding at night. The rear light is very cheesy and didn't even work. The mounts are very bulky compared to some and don't hold the flashlight very tight. When turning the light on, the light can slide through its mount with minimal force applied to the back of the light.
3732301
Nice cheap lights.  Smaller than I expected.

I new from reading the reviews that I would be modifying the mounts on these lights.  the stern light was too short and flimsy.  I bought a 5 Ft., piece of 1/2" electrical EMT conduit and the plastic pipe mount on the light fit in it tight.  I used some two hoel pipe u brackets to mount it to the transom board.  I left them loose so that I can remove it easily.  For the Bow light I thought the plastic clamps would be strong enough but when I tried to clamp it down they would get tight, the plastic just would bend out further and further.  So for that light I made my own mount.  I have a pipe that is mounted in the front bow plate (previous owner).  So I got a piece of aluminum plate cut it to fit,  then drilled a 1/2" hole to mount to the pipe with a bolt. Then I cut the plastic clamp to use it to make a hole template for the holes in needed to drill in the aluminum plate. I used a small punch inserted through the holes in the plastic bracket piece I cut to mark my drill holes.  next I took the mount piece that connects directly to the light I put some epoxy on the mound surface and used the screws provided to mount it to the aluminum plate.  so now I just run the 1/2" bolt through the plate then through the pipe and use a flat washer and Wing nut to tight it up .  Works great.  Very sturdy now.  I would recommend this light to anyone that can make their own mounts as the mounts that come with it are flimsy.  I have yet to take it out on the water and will update how it works after.
1392461
Bought these and have used them for one year.

PROS:  Both front and back lights are bright and have multiple modes, comes with extra batteries for red light, red light has flexible mounting so fits on little kids bikes and on adult bikes.

CONS: Front light is a "tactical" flashlight stuck into a mount.  The front mount if very flimsy.  Both of mine broke, one at the bottom tube connection point and the other broke at the point the flashlight slides in. Mount is not as adjustable as I would like to see.  Works fine for an adult bike, but I tried to attach it to a childs handlebars and it kept slipping and pointing at the ground.
519340
The bike light works fine, and is fairly bright. However, it is quite low quality. For the light itself, here are my reasons for a mediocre rating:

1) The battery is not rigidly mounted inside the plastic housing. When I tilt the light back and forth, the internals slide to the end and hit the plastic housing. This worries me about its longevity.

2) You can see through the clear red plastic that the solder connecting the LEDs is poorly done. The light uses a single strip of tape-mounted LEDs, with solder connections at the end(s) of the strip. It may be effective, and this may not be a problem at all. But clearly this is made by a low bidder in China. Other manufacturers do this too, but with better results.

As for the silicone/plastic/metal mounting strap assembly: it keeps the light on the bike, but it could really be a lot better. It looks and feels low-quality. In addition to that general assessment that you'll notice when you mount this on your bike, I have two specific issues with the mounting bracket / strap:

1) The friction for the tilt mechanism is too loose, and the light can easily be knocked off-axis. It swivels intentionally, but the friction of that swivel is too low in my opinion.

2) There are two metal pieces which slot into the silicone strap, keeping the rigid and flexible sections of the mounting bracket conjoined. On my mount, the silicone is pulling off of the metal piece, exposing it. I don't think there is any risk of the light detaching as a result of this, but it looks bad and shows that the mounting bracket is poor quality.

Finally a negative note about the seller:
This company selling these lights is quite pushy about getting positive review out of you, particularly in the first week after ordering. I think they had pressed me for a review multiple times before I had received the light! They clearly want to get many reviews into Amazon when the lights first hit consumer's hands, and not later after using the light for a few months and experiencing its longevity (or lack thereof).
1784879
I really liked this item but the light mount is a bit awkward. If I could offer any advice have the product pictured on a rail so people will know how close and tight this fits. Other than that I am happy with this item and the light is great.
1299458
The light itself is quite nice... big and bright as it should be. However, the listing details claim it has "rack mount" which is simply not true. I too took the light apart to try and mount it to the rack but decided it would be a rig and probably not stay on the rack. If this light actually had a "rack mount" I would give it 5 stars.
3004100
weak light and it eats up the batteries quickly
2681226
Beam profile is good. Not super spot, but way tighter than most LEDs. Lights are much bigger than they look. Check the dimensions twice! The mount is awful. It only adjusts in am~20 degree notches. Not great for precise aiming, as you have to shim the base to actually aim the lights.
3559113
The light itself was very bright , but the mounting bracket system was not very good
2953862
Light looks nice. Mount is made to go on a scope not a rail mount. Mine won't turn to zoom in. I tried even with 2 vice grips to adjust it. Top guard around lens to get to bulb adjusts fine,but isn't made to focus as a zoom.