In reply to UKC Gear:
I treated myself to one of these as a post-finals present recently and although I've only been cragging at Hutton Roof and Trowbarrow over a couple of days, I love it. Incredibly comfortable to wear all day, even when it's warm and great to hang in as well.
I have high hopes that this will do very well as a winter harness too, hopefully taking ice clippers without too much issue. Should be light and non-absorbant enough to make a good winter harness I think. Surely better than the WC Elite Ziplock I've come from, which although I had no issues with (did I mention that the R320a was an impulse buy of sorts?!) was rather chunky and probably not best suited to colder pursuits.
The only problem I have with this harness is the gear loops. They're a good overall design but I'd rather all 4 were the same size. In fact I'd rather there were 5 of them, so I could rack my belay device, nut key and prusiks round the back, but failing that I struggle a little to cram draws and those odds and ends on in such a way as to work with my racking style but still be easily accessible. I guess my racking system will probably adapt in time and I'm sure if you're doing long routes, the HUGE front loops will be a really good point.
So far I really like it and though it was EXPENSIVE, I do actually feel it was worth the cost (unlike, frankly, most other Arc'teryx gear).