I have two, a 77 and a 91 and I love them both. Really good power, easy to start and incredible idle. They can be a bit touchy to tune right, but once that is done they really perform.
Mine is run with the tuned minipipes and the soundlevel is quite acceptable.
As for fuel, I run them on a 10%nitro/15% full synth. mix that works well.
The liner is coated with true chrome

and they seem very durable.
Flyby