Hi there,
I got my hands on a Samyang 1.4 (first I thought they sold scooters) and the thing is a gem. Focusing is NOT such an issue as you may think, provided you have a nice, bright viewfinder, such as the one on the 7D.
Bokeh is nice and creamy - maybe not as pretty as on the sigma 30mm 1.4 - but the longer focal of the samyang helps as well.
I won't do a review of the thing, as others have already, but I can telly ou that if you appreciate a nice, metal & glass, entirely mechanical optical instrument, you'll love it.

