I've had my mini for about 3 1/2 years; overall I still love it. I think it is unique and it does everything I need it to do; it just drives fantastic.
Cons: the tires wear out extremely fast. I seriously have to rotate and get two new tires at least twice a year. I don't understand why they wear so fast, since I'm not a crazy driver and have low milage. I feel like my car turns on maintenance lights fairly often, even though it is never turns out to be serious ( airbag, check engine ) Also, after about and hour and a half the seats get very uncomfortable.
Pros: everything else