I don't have much time in the plane, but from what I remember is that it's a slippery little bugger without the benefit of speedbrakes. Descent planning is something you actually have to put some thought into, or else you'll never get down. Flaps were also extended to the takeoff position on downwind for visibility only, as they don't really slow you down more than 5 knots or so. The gear will get you slowed a bit more, but I seem to recall a low Vle.
The plane lands pretty flat as well, and I seem to remember that the "proper" way to land was to actually keep the runway in sight up ahead as you flare. There are rubber discs on the mains and nose gear, which are your only source of shock absorption. If you land hard, you'll feel it for sure.
Anyway, it's been a solid 3 years since I've had any time in an M20C, so take all of this with a big grain of salt. Easily one of the more fun airplanes I've flown though. Very quick, as any proper Mooney should be.