I think this lens is a sleeper only because it is fairly expensive to get as its usually found in the R2M/R3M kit.
My copy is sharp, contrasty, and has a nice BOKEH. The only two gripes I have with it is slight vignetting at f2 and a minimum focusing distance of 3 ft.
That reminds me, I have a roll in that camera and need to get it shot and processed before I leave on Sunday... Better get cracking.
JCA