There great, I had a mk1 , the probs I had was wiring as the lights had a mind of there own but it was easy to sort ,you can run alot of boost with no real probs just disconnect the over boost switch , the turbo is tucked down the back so you will need pipe cleaner fingers to check it lol, the real thing you want to be looking for is rust everywhere Inc rear shock top mounts as the cars go quick but the seals go quicker lol.