I can tell you if LittleRocket did the swap and work on this car (barring any destruction by the OP ) then this thing is rock fucking solid. LittleGuy on here (Norm) used to own a 2zz+ Spyder, as well. He lives in Texas and not too far from Littlerocket and had all his work done by him, too. The guy knows what he's doing.
If you haven't driven a 2zz spyder, dont assume to know what it's like. It is an adult go kart with far more room than a miata. It fits my bigass no problems. Absolute freakin blast and more fun than you can imagine.
This is basically a poor man's Elise (same engine, even) but with an interior that shouldn't fall apart or stop working nearly as fast. lol
Anyway, man, good luck with the sale.