Hello Richard,
I bought the Winner sport about a 6wks ago, on sort of an impulse. Its my first rc/nitro and I just bought the thing without doing any research (It was cheap as chips though).
Like an idiot I started reading about nitro cars/buggys AFTER placing my order. 75%of the user reviews I found on this buggy were bad. And as stated above, spares were supposed to be a biatch to get hold of.
Oh crap, thought I.
But I stuck by my purchase and waited for the buggy to arrive...................
...........Its A1

It runs like crap off a stick and seems pretty reliable. I havnt had a single (serious) problem yet. Plus its already had its 1st big crash and it came out of it without so much as a loose screw.
There are some parts which do appear very cheap (ALL of the radio gear for a start, But the servos/Rx have held up to a good soaking and a crash!) but you get what you pay for. This thing seems like a total bargain to me, perfect for a first car IMHO!
As for spare parts.......
My clutch bell is the only part to show signs of wear up to now, so I thought I'd test
www.smartechracing.co.uk out and order a new one. The thing arrived 2 days later. I'm a happy chappy knowing that I've got a reliable source for ALL my spare parts.
The parts may be slightly 'cheap and nasty' but theyre cheap!!! If I have to replace my clutch and maybe my spur gears every month or two its not gonna break the bank.
Plus, the smartech cars are supposed to be compatable with parts from a whole load of other cars from bigger/better brands.
All in all I'm very satisfied with my purchase.
That being said, dont blame me if you buy one and it falls apart in a day
One thing I will say is (and I'm sure this applies to all new RTR's) double check and tighten every screw, bolt etc before use. Some of the horror stories I read about smartech cars involved loose clutch bells and flywheels coming off at high RPMs and causing all sorts of damage to the car. I'm not sure if thats even feasable but it scared me into checking my car all over.
Hope thats of some help.
Good luck,
Let us know how u get on.
Cheers,
TheSweeney.