I am prety broad shouldered at 6'1" and 220, and at first I thought the pcket seat was too narrow and really hurt my shoulders when I took it for a test, but then I realized the straps were loose. Once they were tightened up I felt no discernible difference between the pocket's seat and any other catrike.
However, IMO it needs bigger gears. It's definately got a great low end, but I hit top end pretty quick and find myself wanting a lot more. So did my wife when she tested it. We're looking at getting the road now for her instead, and a speed for me. We both have pretty strong legs.
We're also considering the ice QNT.