Product review (5 stars): no complaints, awesome purchase
I've had these for at least three years now and i love them.  They are a challenge and you must be commited. Took me three days to balance and about a month in process to figure out how to pump or just get around.  There is an instruction video on you tube but what they don't tell you is that when pumping you have to push while making the weaving motion to actually get places.  Once you get it, its loads of fun, and I get tons of peoples attention with them.  Highly recommend for anyone and the quality is very high and flawless.  Very very happy with my purchess.