I had the Joker kit around 10 years ago. You would be better off getting the ScaleKraft kit, as its based on the very good EXMODEL of Japan TZ kit.
The Hiro is the best of the lot, but rather expensive. The big problem with the Joker kit is the wheels, wich are not very good. Joker kits are rather simple. I had the Dino, P4, SZ, Ford GT longnose, Lotus 33 and TZ1. They all were rather crude with no decals. The only semi detailed kit from them was the Alfa SZ shortail wich has engine detail and photoetch.
Tom Tanner/Scale Designs/Ferrari Expo 2010 model/photo contest-Chicago April 24, 2010