The 712 is not a bad tire, just not an "ultra-high performance" tire. You get what you pay for! I had a set in 205/50/15 on my 'tour for a while and they were a very nice tire for street use and for having some fun in the corners. But, I took them to the track and they did not keep up. They got greasy after a few laps (even after playing w/tire pressures all day), squealed loudly when cornering, slow lap times due to lack of grip, etc...
If you're only driving on the street and not into having the best brand name on your car they are a very good option. I hear the Falkens and Sumitomo's are also good, but I've never used them. HTH
Oh, and never try and drive in the snow w/them!