i rode the 179 MR all last season
such a fun ski super light and poppy, turns fairly well for a twin, they have a 93 waist so they float pretty well if you do get into some deeper snow. i ride on the east, and took them out to oregon and washinton during feb and got a few feet and they didnt put up to much of a fight.
pros- light
-poppy
-flexable (butters)
-awsome warrenty (all BH skis)
cons- top sheets delam
-edges came out at tips and tails
-lost camber
those were the only problems i had but BH took care of it and replaced them for me no problame-o.
this years MR is stiffer, made of tougher materials (less topsheet chipping) and the edges wrap around at the tips and tails so they wont pull out as easy.
hope that helps.