Mine is in the shop and I haven't had a chance to use it on my 'new' 6d quite yet. It is by far my favorite lens though.
I love how it also bolts to my EOS film cameras because I know I can shoot as slow as 1/10 without any problems.
Canon Rebel G, 35mm f2 IS USM, Kodak Ektar.
I was looking at the 24mm 2.8 IS, but I don't think I can do 2.8 - too slow. I think I'll save my pennies for the 24L.
It is interesting though because while my 35mm is in the shop I'm using my 2nd widest lens - 50mm. The 85 and 135 don't really go on my camera very often. I'm going to Europe in a month from now and I'm thinking I'll only take the 35mm with me. I don't really do portraits and even my 50mm is too tight for what I like to shoot. I bought the 5d and 35 f2 IS together and it was my only lens for about a year. Not having it is worse than I thought it would be.