I have a set of those tire in 19" (235 and 265") for 5-7 000 km, really the WORSE tires i ever had. I try them with two coilover setup (first with TEIN Monoflex and now with KW V3).
Yes the grip is good, yes they look ok... but the directivity and steering accuracy are awful ! my car feel like a hovercraft when i drive above 100 mph, the sidewall of those tires are really to soft for a heavy GT such the Supra.
To figure out, i try switching the 4 wheels with a friend and his Falken tires (also on Volk 19" wheel), those were much better in directivity and car feeling.
Now i m considering Contisportcontact 5p, ready to spend good money on tires since i so bored with those Toyo