This is a great little light to help you be seen at night (maybe not so great for daytime, though). The installation and removal couldn't be easier: it takes about two seconds to move it from one bike to another, making it versatile and theft-proof (if you remember to take it with you!). It has more settings than I can use, but maybe they're good for something (anyone seen "Close Encounters"?).

Some people have complained that it isn't waterproof, and you should note that the rear assembly is essentially open, so you should be careful accessing it when wet. Once it's on the bike, though, the seal seems pretty good; I've gotten stupid soggy on the road but under my seat this little baby kept flashing away.

This is a great flasher for those who get cuaght in the dark. Should not be used as a primary light source.

this is a good bang for the buck. it easily attaches to the bike in very many possible configurations (also means its easy to steal). uses AAA batteries instead of button batteries (also a plus) which means you could use rechargeable batteries, although the light is not as bright when using rechargeable batteries. not waterproof. also it drains the battery even when not in use

Easy to use e very beautiful. It is perfect to use on city rides.

Not very powerful but usually enough as security lights

i love it!!!

Cool little lights. I bought the red and white lights to throw onto my bike for when I'm riding home from the bar and want to be seen. Bright little guys with multiple settings. Battery life seems decent and the battery is easily replaceable. I like the fact that they are this rubber material and are put on and taken off with ease. I got these on sale for [$] a piece so that was a big plus! I love Jenson!

Good as a reflective type light. NOT made to be a useful night light. Good so cars & other riders can see you.

I've found I can easily install the knog Gekko in various places on my bikes. It can attach around the aerobar on my tri bike, on the handlebar of my road bike. It can go on the seatpost or on the frame. Basically, you have a lot of options. I have both front (white) and back (red) models and they seem to be bright enough to catch the attention of motorists even at mid-day.

These are so easy to mount anywhere. I keep a few in my camelbak, saddle bag, glovebox, etc. just in case I'm caught out later than expected. They are great for loaning out to another rider since you don't need tools to install them either.