I have been really liking this backpack. Plenty of pockets, just the right size for mountain biking, fits nice and stays put on your back. I had a dakine that was a bit smaller and it just wasn't enough to fit all my mountain bike gear. This one is just a bit bigger and fits it all, you still don't feel it on your back when riding. The water reservoir is really cool. It has a really wide mouth at the top for filling and to close it you fold the top over and it has this ziplock type clamp that goes over it. Much better design than the normal screw tops that are always hard to fill.