I had a go on one when I was 10 years old and loved it, now I'm 36yo and I have had mine for about 3 months or so, and I love it, fun to drive, turns more heads than a Bentley, looks great, just makes me smile.
I have used mine once or twice a week since I brought it, so seems to be reliable too. (Touch wood)
Well ahead of its time, but I think the best thing about it is the fun, me and a few friends took it down to our local park and we spent the whole day messing around on it.
As a driving instructor I spend all day driving, if I have a hard day it's great to get on the c5, and just play.