Two days in on my new, old stock Proteus 180 (I snagged it during the BoL sale) and my level of stoke is matched only by the pain in my thighs and left (front) buttock. I fell in love with the design during the 2012 ECES and my impressions then have been confirmed - it's just so smooth, solid and powerful, with outstanding pop out of the turn and it just pretty much ignores ice. I think Sean now ships these all tuned up but this one is older - serial 3907 - and the board came with nice base structure but no bevel. I spent some pleasurable time getting it to 1° Base 2° side with no de-tune. Used a Ray's Way tool to wax it but I think I'll have to hot wax also which always scares me a little, even with the bindings removed.
First day was a bit of a struggle inasmuch as I've hardly been on snow at all since 2012 (took a job in Florida) and no part of my body was in proper carving condition. So although the board was doing everything it ought to have done, it was mostly just overpowering me - big fast turns which I couldn't tighten so I was constantly doing little speed-checking skids just to stay on the trail. Even so, the board held in crunchy conditions where other boards would have sent me sliding. I had set up just as I had with my old Coiler Racecarve 180 - 19 5/8", 63/60 with toe/heel lift and a little inward cant - but I did a little stance tweaking towards the end of the day and then after some hard thinking and reference to many of your posts (Thanks Workshop7, Beckmann, Michaud et al...) I went wider and shallower than before so I'm now around 20 1/4" and 60/57, still more or less centered on the inserts but with my back foot slid back towards heel side just a bit.
The difference was kind of amazing. The stance feels awkward on the carpet but much more natural on snow, with much more power available to me and much more control over the tightness of the turn. The board responds instantly to almost any degree of tilt and if I do still need to tighten mid-turn I can stand hard on my back foot and it'll crank around really quickly without any sketch at all. I've never felt really comfortable on VSR rigs but the 13m constant radius on the Proteus suits my preferred style better than the 11.5 on the Coiler - it's much easier to make a really big turn and the construction makes variable surfaces just as smooth without a plate as the Coiler was with plate. The board is still a real workout for someone not in riding shape, hence the leg pain, because it is very stout and is just throwing Gs at you with every turn, but it's a nice problem to have and I'll have a few more days to get acclimated before I have to head back down south.
I'm not much for hollering on the trail - trying too hard to catch my breath - but the people on the chairlifts were doing lot of hooting which was nice and confirmed that the ride looked as cool as it felt.