Just got back from a week in the boundary waters with this water pack. It worked great inside of my Dakine shuttle pack. 3 litre capacity was great; I only had to pump water once a day opposed to the rest of my crew who were constantly refilling their canteens and Nalgenes. Bite valve is great because you never have to open a top to get to your water it is always right there on your shoulder.

I bought the Omega Reservoir when the bladder in my generic bike hydration pack broke. I wouldn't dream of buying anything other than camelback. My Omega is still going strong (and clean) after about 3 years of use from biking to hiking to easy water access on long road trips (just hang it off the back of the seat.)

The wide mouth is great for getting ice into the pack and makes cleaning much easier. The seal on the bladder is also super good, you can feel it when you close it. I once had trouble getting it open it was sealed so good (but that is probably more my fault for letting it sit for a few months w/o use in the winter). I've also endo-ed straight over the handlebars and on to my back while biking, and the camelback did not break. In fact it probably helped alot to cushion my fall. I can't imagine life without the camelback.