These have been on sale here for a while. I drove one when I was looking for a car. Rear headroom isn't very good, and the trunk wasn't very big (I was looking at wagons, so maybe not fair). It drove OK, but wasn't as polished in engine smoothness or trans shifting relative to an accord V6 or sedans from other Japanese and German brands. The transmission felt unwilling to kick down and stay down for passing and acceleration, at least in the default mode. The suspension was choppy on rough surfaces like a sports car, but the curve handling was more 'sporty sedan', with some body roll and plow through corners. It felt very heavy, but it didn't have any really negative driving habits. Brakes were very good. Rear visibility wasn't great (look at the C pillar thickness). The interior/dash is a copy of the merc C class, but with inferior materials. There wasn't really anything wrong with the car, but it cost 57,000 Swiss francs (59K USD, MSRP price), which is comparable to or more than German cars that have about the same performance specs, but with much greater refinement and much nicer interiors. I have no idea what these sell for in the US, but here they have positioned it up against the C400 merc 4 matic, Audi A4 AWD, and BMW 330i xdrive...and it just doesn't bring enough to the table to compete with those cars.
Edit: I looked at the US and Swiss pages and we get the GT3 variant here, but it is called the GT. We don't get any other models. The top trim in the US is still like 50 grand MSRP, and I can think of other cars I'd rather have.