I bought this pack to wear during my long training runs, and was overall very happy with it. I did end up wishing I had bought the smaller Access pack (which does not have a storage pouch) as I rarely carried more with me than water, keys, and a gel or two. In order to make the pack feel "balanced" I had to twist the pack and wear the water bottle directly over the lumbar spine, and the pouch over a hip. The water bottle was tricky, and took some figuring out, but I ended up really liking it once I had gotten the hang of it. The pack has worn extremely well (I've had it over a year now, and used it while training for multiple events). The pack has minimal jiggle when running, the straps are comfortable and easily adjustable, and the water bottle rides very securely. I'm dropping one star because the bottle does leak sometimes.

The pocket size is great for long runs. It has enough space to carry cell phone, small emergency medical kit, power bar, ID, keys, etc. I am a little worried about putting anything in the ID pocket, it seems like it might fall out.

I love this pack. It sits well on my hip/around my waist, is very comfortable, and a good size for short walks. But I HATE the bottle that comes with it. I have 3 of these packs, so I have 3 bottles, and every single one of them leaks something awful. No matter how loose or tight I screw the top back on, by the time I've gotten to my destination my back is all wet from dripping. No other brand of bottles I've had do this, so I don't know what the problem is with these. Too bad.