I've got Olympus/Zuiko adapters, Nikon adapters, and M42/Pentax/Takumar adapters, along with an EdMika adapted Canon 55/1.2 FL and a Jim Buchanan adapted Minolta 58/1.4. They all work great on crop bodies, not sure about full frame as sometimes there is mirror interference.
I highly recommend the Canon 55/1.2 FL, the micro-Nikkor 55/2.8, and the Super-Takumar 50/1.4 or SMC-Takumar 50/1.4. The SMC-Takumar is very slightly sharper than the Super-Takumar, but not much. Of these, the Canon is the most expensive and the Super-Tak the least. If you need razor thin DOF, the Canon is the tool of choice. If you need macro, the micro-Nikkor is stupid sharp and focuses to 1:2 without the extension tube adapter. Takumars are plentiful and relatively inexpensive. All of these are built like tanks and a joy to work with.
Feel free to PM me for more info.