I've used this light for 2 years in all types of weather. It's held up through the test of time. The rubber flap cthat covers the USB port came off about 6 months after I bought it. It still works, even in the wet. It's basic, just two options, solid red or flashing. Motorists see me. I know, I have to pull into driveways so little old ladies will pass me, they might think I am superman.
I don't know where Planet Bike comes up with their battery life time. Mine lasted about 12 hours, it went dead in the middle of a ride. Light is not as bright as the Super Flash AAA battery model (I have both), but bright enough. I plug mine into my computer after each ride so the battery is always charged. One problem I have to to remember is to turn the darn thing on before I take off for a ride. This will make you visible, but it might attract the crazies who want buzz you (the three feet law is a joke in Ca). However I feel safer knowing the I am visible. Most roadies in my neck of the woods have some type of lighting system. This cost a tad more than the battery version, but not having to scrounge up 3AAA batteries every few weeks is a big plus.Excellent value I might add.