Not as easy at it looks. I would give the halfbike five stars if it weren't extremely difficult to learn to ride. The makers gloss over that fact and show young folks expertly riding it around town. Going in a straight line is tough but straight forward. Turning, however, is where I found it incredibly difficult. There needs to be a number of riding tutorials at different levels as some folks will pick it up at different rates.
The concept and build quality are top notch though...