I have a 24 inch UW, I found that although it is hard to learn, it is fun. Don’t expect to go on long rides with it since it is hard work riding it. For me the most challenging thing was preventing the wheel from sawing my legs off. I use leg armour with a pair of jeans on top off it. The tire mounted on the nimbus UW is not very suitable for it since it does not have a smooth sidewall. See also this post:http://unicyclist.com/forums/showthread.php?p=1428807