So, anyone have a Trikke?

[NotUrsula]

I'm looking for a new fitness activity to try, and I'm kind of curious about the Trikke. I've read really good things about what a workout it is, but they are a bit pricey and I don't know anyone personally who has one, so I'm looking for testimonials. How wide does the path really have to be to ride, and does learning how to use it involve lots of pain? How's the fun factor?