I'm not local enough to be of much help, but if you're ever around Derby you'd be welcome to a go on my Joey, though you haven't said which model Airnimal you're interested in.
I like mine, I would even if it didn't fold, it's a lot of fun to ride, a bit slower than my other bikes though it's not something that bothers me. I've used it for a couple of tours and it's comfortable enough to ride all day. I'm tempted to have a go at a 200 Audax on it. Fold isn't fast and the resulting package isn't particularly small or easily carried, I wouldn't want to be doing it on a daily commute, but it's fine for my use. The other advantage is the one size fits all, visitors no longer have lack of bike as an excuse not to come for a ride.