I have one (i bought it at the kyosho store on Ometesando in Tokyo). It s the Mazada 787 version..
First it s just as fast as anything out there.. it runs like a regular mini-z except it s half the size
THe package is very complete, the radio is by no means a toy as it s full 2.4ghz, just as proportional as a m8, every car has a unique transponder ID on the bottom that acts like a mini transponder to track lap times on a properly equipped track.
It is powered by a mini lipo battery that you charge with a small AA-powered charger.
Body is very durable (although the wing is a tad fragile...but that s whay you get from running a scale-look model).
There are many options coming from kyosho, such as a gyroscope to "calm" the car.
Overall it s not cheap, more like 240 USD for radio,car,charger, battery and chassis of your choice... but it s much much more high tech than a regular MZ. It s like a Mini-z for upper income adults.... its definitely not a toy and i would not let my kid near it...
But it s perfectly raceable, PERFCT scale look (the wheels are amazing), handles very well.. like a regular MZ, and it s FAST ! and quality is top notch... with of course the slew of options to be expected from Kyosho
Let me know if you want more info..