Rented one myself this weekend for use on the 5diii. First few hours I can say I'm impressed. Nothing but family shots planned this weekend, which I would generally just stick to something light like a 50 1.8 or 35 f2, so far I have to say I like it. I've never been a fan of any of the upgrades from the nifty 50 as neither then 1.4 or 1.2L blow me away. Additionally i never thought I'd get enough use out of a 35 L, or 24 L so as a replacement to a couple of serious L primes it may in fact be cost reasonable. I can say the bokeh is very creamy at 2.8, and at least my current copy seems tack sharp. My computer is stuck at the apple store for repairs so it maybe be a few days before I can see full sized shots, but I can honestly say I'm seriously debating this lens as a my next purchase.