what i have learned from my mates with rotors.
They only get 80,000 to 100,000 kms out of them before the apexi seals go and need a compleat rebuild
they are very expensive on fuel
my mates seems to spend more time in the shed being worked on than on the road
they go like stink, but sound like a fart in a bottle.
Mind you theas are series 4/5 rx7 I am not sure if they improved the reliability and economy of the fd series