Many have experienced flawless reliability with their Crossfires.
Others have had problems. Same goes for just about any car.
Parts are expensive IMO and if something goes wrong out of warranty, it will not be cheap.
Tires are expensive and it takes 8.5 qts of synthetic oil and a ~ $20 fleece Mercedes oil filter.
The sale prices on these cars is pretty cheap at the moment, but don't let that fool you. They are almost all Mercedes underneath the skin.
Good luck.