I have just got one and has to be said I am loving driving it.
I think that the problem when they first came out was that you could only really get tyres suited for american tracks, which were not really suited for our astro/grass tracks. The cars handled pretty poorly and it put a lot of people off. Now we have schumacher minispikes, and pins, D-boots on the way, Kourse kings, they will all work well on the tracks that we drive on so I am hoping that more people will see the trucks going well and decide to have a go.
Personally I feel the 2wd trucks make a good beginner car, tough, handle the jumps and bumps well and with the right tyres easy to drive. They don't need expensive equipment to be up to speed either ( mine is currently running a budget savox, Lrp sphere reverse ,4 year old Novak SS 10.5 and 30c batteries) so fairly cheap.
I'm looking to do the short course nationals this year and I am hoping there will be a good attendance this year