Well here in Germany the car is not popular. I have sat in front of it with a friend for two entire days and we were not able to get it to run as well as a B4. I don't want to say it's a bad car and other people seem to be doing fine with it.
The thing with the B4 is that everyone has parts, everyone has some sort of setup they can help you with and spares are cheap. It also handles very nicely!
Kyosho is a bit problematic with spares here in Germany. Don't know what it's like in Norway