Bought this bag for dirt biking, not mountain biking, so while it didn't work for me, I am still giving it 4 stars. The pictures make this look almost like a daypack, and since I need room to carry tools, parts, water, food, and layers for longer days (4-6 hours plus), I thought this bag would be great. Unfortunately it is a little small, (it looks in real life the way I think the Drafter looks online) only fitting my tool bag (about the size of a dopp kit), a 3L rain shell and some small stuff, and that was without the bladder filled up, so I am returning it to get the Apex 26L. On the flipside, I think the quality is high and the pockets are pretty well thought out, and the fabrics and zippers seem tough enough for heavy use. Getting to the middle "organizer" pocket (which sits behind the compression straps and outer expanding pocket) is a bit of a hassle, but assuming you're stopped on the trail for a flat, and not in a race, probably not a big deal. I would definitely recommend this to anyone seeking a larger MTB bag, for all-day rides like Porcupine Rim, but more for DH/AM riders than XC riders, as it's pretty burly. The back padding didn't bother me, and I find it a welcome change from standard mesh-over-foam that gets soaked with sweat very quickly. The waist belt is wide and supportive, and the straps aren't overlong (a pet peeve of mine). I didn't use the full-face carrier, but the expanding pocket on the outside would be great for stuffing a shell, assuming you don't care if it gets dirty. I didn't use the bladder, so I can't comment on that. Overall a very nice design; just a little too small for my purposes. Like I said, I will be getting the Apex, if that is a testament to the quality.