I am a big fan of vest packs and I use one for both trail running and skimo races. I am also a fan of cleanly designed climbing packs, where the main storage area is simply a tube to be stuffed with your gear. I was very excited about the concept of a tube-style climbing pack with vest features on the front, to save time with eating and drinking but still having a nice storage capacity to carry climbing gear.
They got the tube part right on this one, but not the vest. The pockets are too small to carry enough stuff to save you much time. The two upper pockets are too small to fit even a single gel, so I'm not sure what is supposed to go there. The lower zipper pocket can fit a Canon S100 camera or iPhone, but it's tight and presses the contents inward on your body instead of bellowing out. The bottle pocket can actually fit a bottle and stretches outward, definitely the most comfortable pocket on the vest.
Most vests locate pockets both on the front of chest and on the sides, under the arms. The pockets on this vest end up somewhere in between (at least on my body) and the result is that flat objects press uncomfortably against the rounded sides of my chest and ribs.
The lack of vest storage capacity combined with the discomfort of the pocket locations prompted me to return this pack without even taking it outside. It otherwise seems like a decent pack, although the ice tool attachments were a little fiddly.
I know the idea is to be light, but it would also be nice for this pack to have a minimal bladder sleeve. I suspect that once the gear is taken out of the pack to begin climbing, a bladder simply hanging by the velcro strap would flop around quite a bit inside the pack, even with the compression straps tightened.
I truly hope to see this product refined in the future and I would order a new version without a second thought if it looked like these things were fixed.