I've ridden one that I borrowed from a friend. It was a pretty poor one and not in good condition but still quite fun. I'd quite like to have one as it would make it easier for my wife and me to go out together - her pace is around a quarter of mine - but we've no money to buy one and nowhere to store it if we did. Actually, I'd love to have a recumbent tandem but that would require even more money and even more storage space so that's definitely out.