I have a 3L Osprey Raptor that very recently replaced my 2L Camelback. The Camelback was nice but the Osprey is just superior in every way. If you're thinking of the Camelback I suggest you look at the Raptor as well and decide. The Raptor just has so many nice little features that the Camelback doesn't have. The semi-rigid bladder is much easier to fill and empty, the bladder zippers in instead of having to thread the tube through, the spout is held on by a magnet instead of a clasp, the tools are held in a nice tool roll that makes using them in the wild much easier, etc.