I've had them for fitted on my 19 x 8.5 blitz wheels for about 1k miles so far. I'm no tire expert but I'm happy with them. I actually wanted to get the Toyo T1-S or the Yoko AVS but both were on back order and I couldn't wait.
I had nittos previosly, 235/40/18 on my old wheels. They lasted alittle over 30k miles. That's good considering my car is sitting kinda low on coilovers and cambering in the rear..
I don't know anything about the warranty though.