I drove one in high school. As mentioned... really fun, handle well, and great gas mileage. Can't say much else, though.
Thing is, they don't really lose value. Those cars have excellent resale.
I sell MINI's here in north Houston and can honestly say before working here I thought they were lame. After driving them and being around them, they are an absolute blast to drive. I think my next big purchase might have to be a MINI as a DD.
I would definitely steer clear of automatic MINI's before 2005. The CVT transmission was a huge POS.
Feel free to shoot me a PM if you have any questions!