I LOVE the B-Class, but damn it is expensive with any sort of options added. Hence why I'm hot on the Tiguan instead (and went GTI last time). Regardless, Mercedes is doing a great job moving them. It's been a huge success, moreso when you consider the appearance (which I happen to like since it's packaged so clever) and cost.
The reliability issue is still a question mark for me as I've asked 2 people who have owned them and both had quite a few issues with theirs (B200 non-Turbos). The Turbo I test drove even had the check engine light illuminated, which isn't too reassuring.