I am loving colemak.  I feel less pain when I type (my ergo keyboard made it only a little pain but now it is even less-none :D).  I am up to 45-50 WPM (closer to 45 but I fluctuate on the test I like).  I also am not losing my qwerty skills (still about 60 give or take 3 words)!  The person who invented it is a genious :D.