I have the waterproof one (not about to test the waterproofness) and its a very solid unit. The battery is an 18650 which will give a much better over all use time than the cr2s. The focus ring is very tight and takes a bit of force to turn but it wont wiggle on ya and defocus. The burning power of its incredible as with any of the 200mw reds. Personally I would suggest the waterproof one if you want just a good solid laser with a long battery life. Only downside I can see is no warning sticker on it but I know what it is and it WONT fall into the wrong hands since its already in mine and those are the worst hands.