Recently I have been using my 50L almost exclusively for my shoots. I do use my wide angle when I need to either for interior shots or for the dramatic wide angle look. The 17-40L always left me a bit disappointed in terms of sharpness, wide angle distortion, and corners were always lacking.
The new 16-35L has come out and it has me very interested. The sharpness looks to be fantastic and distortion seems better also. How many have switched from old 17-40L to new 16-35L IS and have never looked back?