Yeah, it's a great lens, and not a bad price for an L lens I reckon. I should have waited until the MKII came out and snapped up the IS a bit cheaper, but no one wants to wait for a 21st birthday present! Haha.
When my phitography makes me filthy rich (BAHAHAHAHAHAHAHAHAHAHAHAHA!!) I'll upgrade, but for now its fine.
Although the above photos were taken on my 17-85.