I think there's at least a 20 year span in which various bits were used, shared, and given a mild facelift. Makes it great to find replacement parts. Also, 7.3 Turbo Diesel.
4/10 - I don't even fit inside the damn thing. If there was a sunroof on that car, I could drive it like a tank commander poking his head out of the cupola.
Porsche 924
And yeah, I too, am a TVR fanatic. The one thing about the Sagaris that I don't like is the ugly asymmetrical bubble roof. So that Sagaris roadster is pure, unadulterated awesome for me. I would happily use it as a daily driver, TVR reliability and all.