R-Tune

What are peoples thought about R-Tune, I havent heard anything about them until today so Im curious as to what people have to say about it. I was looking at some things from there like the power brace.

I think Rtune is just NISMO parts that are designed for racing. they offer no warranty and they will void your new car warranty if used.....S tune are NISMO parts designed for the street and they will still honor a new car warranty if S tune parts are installed

Ok, thanks, Wont have to worry bout warranty since its an 89 that ive got, just found some parts for a decent price and never heard of it, so I waned to find more info