| I had an '03 Cooper CVT that had quite a few problems. Most were fixed under warranty and the dealership was fabulous. I had one electrical problem that caused the whole car to be torn apart, after warranty, but MINI Canada and the dealership absorbed the majority of the cost and the car ran flawlessly after that (June 2006) until it was traded in on an '06 Cooper S Competition Edition in January of this year. Despite the problems I encountered with the first car, I recommend a MINI.
Check the service records on the car. If there have been a LOT of things fixed under warranty, maybe you should walk away from that particular car. Drive the car a few times to make sure everything feels right. Try to buy a car from the dealer. I know it will be more expensive but the dealers have MINI Next, a used car warranty programme. It will be worth it for the peace of mind.
Mileage: My S is getting an average of 30mpg and that is driving in Vancouver rush hour daily. The Cooper got about 34-35mpg.
Maintenance: I have the oil changed every 5-8000km, despite what the computer says. It just feels better to change it before it gets ugly and it adds to the resale value of the car. I believe as of 2006 basic maintenance was included but I'm not sure if it was 2006 or 2007. I gladly pay for the additional oil changes I have done.
Canada has the MINI Classic, a basic, low option MINI at a lower price but still with the same warranty and fun factor. We also have the Cooper, and the Cooper S, super charged up to 2006 and turbo charged for 2007 forward. I suggest going to a local MINI Club event and picking a few brains. Maybe even catch a ride with someone on a drive. Then check out your local dealer, or more than one if you are lucky enough to have multiple dealerships in your area.
Hope this has helped.  | 
