That is good when you do not have to pick the wheel from the ground literally every two seconds
Personal log: 6 hours of training; I can land at least 10 revolutions 10 times in a row. From now on I am not worried, I know that the wheel is rideable with a bit of work. The hardest part was to learn how to do the first half of the revolution.
Interesting thing: it really helps to ride the wheel in a wobbling style, I guess it offers lots of tactile feedback. If I happen to ride in a perfect balance, I feel like I lost the feedback and I inevitably fall in few revs.
If anyone is still hesitating, the UW offers lots of fun. BTW, personally I do not feel like I need any protective gear besides long pants (jeans) and gloves. In 6 hours of learning I fell twice, gloves were sufficient.