Karen and I took an M3 (just for you Daveo ) MPS for a drive a week or two ago, and I have to admit I was more than a little impressed. I was a lot more impressed than I expected to be actually. That said, FWD dynamics don't really do it for me, and it apparently has a stability control thing in it, so I deliberately botched a corner entry to test it and it happily understeered towards the side of the road lol. In the rest of the corners it seemed to hang on quite well though, maybe they've tried to make the stability control not too intrusive? Powering out of a corner was frustrating but something I could live with given the rest of the package.
I thought the interior was fairly nice, the seats and pedal placement were good, the wheel is adjustable for reach and tilt and the dash is fairly easily readable. My only gripes were that some parts of the interior felt a bit cheap, and the clutch was really grabby, nearly as grabby as my old 5 puck brass button - it went from nothing to fully engaged in probably 10mm of pedal travel. This is fine if you're expecting to do a fair amount of track work or hard driving, but for a vehicle that I personally see as a quickish road car rather than something I'd be wanting to take to the track all the time, it's a bit annoying.
Gordo, peak power to weight doesn't tell the whole story, these things make stupid amounts of torque from 3k up until nearly the redline. In gear they are really quite impressive