In reply to Confused Chimp:
I took part in a winter course a few years ago in Glencoe and the conditions were great which made it totally worthwhile. However, this year is really mild and hardly any snow. There's a Ben Nevis webcam on the tourist information site, just to show you the total lack of snow.
Maybe hold off till late February early March, in the hope for better weather.
It's a lot of money to spend if there's not enough snow.
Hope this of some use?
Johnny