The first lens that I bought for my 50d for 1 year ago and I can only recommend it.
The lens does however best in full format then burn willows becomes 80mm on 1.6x crop sensors, the focal length, which unfortunately is not as versatile. In many situations, it will therefore feel very 'crowded' through the viewfinder.
+ Sharp from 2.0 to 11
+ Fin bokeh
+ Manual Override
+ Quiet AF
-Soft at 1.4 yet approved
-A little plasticky
-The minimum focusing distance
At this writing, costing the lens that cheapest 3300kr, a good buy if you ask me.
I also think it is a better choice than the affordable 50mm 1.8 that has worse AF, lower brightness, is loud, has edgier bokeh and has a solid of a toy in comparison.