In reply to Milesy:
My friend had these issued to him for ski patroling in canada and he loves them. I know the weather isn't that wet and miserable on the hill sthere compared to the Ben but he spent the whole day guiding back country touring in constant heavy snow and didn't get wet.
He uses them for ski touring, ice climbing, skiing you name it and he loves them. I think they got a slightly less tweaked version before they went on general sale and he reckons they are the best thing. Before that they used back country pants which he still uses and are also excellent.
He comes over to the UK to winter climb and walk every couple of years and he has used the backcountry pants with long johns and carries a pair of lightweight over torusers just in case he feels he is getting soaked but he has never said yet that he has beeen soaked.
His are slightly modified with an old bib and braces from another old pair of salopettes that he had professionally attached, which is an excellent idea.
HTH, Den