It's an awesome experience, real attention grabber. At the same time riding difficulty makes it something special, because it absorbs you into the learning curve. Great for parks and plazas, but not that great to use it as a commute vehicle, for longer distances (at least in my city - Sofia, Bulgaria). It requires a good physical shape of the rider to maintain balance and speed, but it helps to get fit because the whole body is involved.
I recommend it to all people that are looking for new and unique experiences.