I've spent 5 years and 2500 hours in the RHS of the most underpowered of them all: 42-300 and while it's performance wasn't sparkling, it was quite adequate. Handling is pleasant, with roll being slightly on the heavy side and my verdict is that the airplane is absolutely good aircraft to fly. Aaahhh... the days of yore, when I would land my ATR at SZG from 9000 ft on downwind without 360ing it, without extending downwind by much and not waking up EGPWS either. Systemwise, there are lot of things that could have been done better (NWS for example) but you can live easily with ATR's peculiarities. Also the warm underwear is a must during middle-european winters.
And if you take the job and your ATR is green-tailed, take care when operating into MUC because the worst icing I've seen is in the area just north of the alps, low teens in winter and high teens in summer. Turn on level 3 early and if you get more than about 2 cm of ice on ice evidence probe on climb-out from MUC - turn back.
Just my 2 eurocents...