In reply to TobyA:
FWIW I've been using the jacket and salopettes for the last couple of weeks now. Tested in some horrible conditions high in the Lakes, plus 6 days mountaineering in Scotland - everything from cold blue sky days to high freezing levels and lashing rain, via 70mph winds and blizzards.
The jacket is a lot lighter than ProShell and on the face of it looks less robust, but this is purely an observation and not necessarily the case. Both bits of kit stood up to all conditions really well - I didn't get wet once and the weather on a few days was foul. I'd say Neoshell feels more permeable than ProShell but this wasn't an issue, even when standing around in negative windchill at 1000 meters. It definitely breathes better than ProShell. Wore the jacket over an R1 with a mesh base layer. The salopettes over Powestretch tights. The only place I was damp after working hard all day was under the salopette bib (like Toby), but I'd say this was partly due to my jacket pockets being loaded with gloves, maps and the like.
Fit on both is great - no flappy baggy stuff going on. Best fitting hardshell trousers I've ever seen. Didn't bother with the internal gaiters apart from once, but I do have an integrated gaiter on my mountain boots.