Best big wall harness out there hands down. I love the free yosemite hammer holder attachment. It really comes in handy. I like the multiple gear loops with the large one on the rear and an anchor attchment point on rear as well.
It's extremely comfortable, like sitting in a chair when belaying or hanging. The legs are very comfortable, maybe the most comfortable I've ever used. Gear loops are well designed and easy to access and the extra belay loop is great.
With the additional size of the back there is an additional amount of moisture that builds up in the back. The only real drawback is that you can't put it on with as much 'speed' as other harnesses I've used. But this isn't really a big concern of mine. I don't like how Black Diamond has stopped having two clear different colors to show that you have/haven't double backed and this harness has that same new quality where the difference in color isn't as obvious as how they used to do it.