Funnily enough I have a Blata for sale!!! R1 colours. Quality on Blata's is good compared to the cheaper ones (discs back an front + quick engine). To get better you need to spend big bucks for a proper racing one.
They're great fun - car parks and stuff, although you have to be quite limber if you are 6 foot plus to ride them - they are as fast as you'd want them to be and no hassle.

Scares me more than my old ZX6R does. 30 mph feels like 160 mph when you have no suspension and you are a foot off the ground!! They draw a crowd wherever you ride them!!!
Selling mine because of lack of time (baby due August). Already sold my petrol R/c car and they are loads more fun than those.
I paid £750 a year ago but you can get them new for £600 now. Mines for sale for £250. Never fallen off it, and it's had about 4 tanks of fuel though it (that's less than a gallon).