It is an amazing car. We bought one back in 1991 and still have it. 30 years now.
Back in the days it was a very technologically advanced car, very light weight, mid engine set-up, long hood, rear wheel drive, unique sliding doors, wonderful I6 engine.
Today it still drives great. Still turns heads and get's lot's of attention.
Indeed all the body panels are made of plastic. The idea once was that you could buy another set of body panels to have multiple color cars. Never heard of anyone buying a second set, it was a few day job...
Only 8,000 have ever been made. BMW introduced it is as a show car, however after getting so much interest from clients they decided to make and sell them.