On the original question, I'd say they're superb, by far the best used sports saloon for the money.

Even if you look into slightly higher priced used sport saloons, they can still come out on top. Just take a look at some of the comments on this other forum below, including how a guy admits that the ST220 totally rogers his BMW 330 on performance...

https://passionford.com/forum/showthread.php?t=257001&page=2&highlight=st220