They are actually very good tires. I've heard nothing but good things about them both from tire dealers (who would be happy to sell a more expesive set) and from normal users. I got a set of Mayrun MR500's installed (235/35/19 front and 255/35/19 rear) for $400 including mount and balance which is just about as good a deal as you can get on tires. Grip seems solid, road noise well controlled and ride is no worse than the Bridgestone OEM's. Most importantly for me, while the OEM rears would break loose under lower gear full throttle acceleration and trigger my traction control, these tires do not. The traction advantage is definitely there.
To add this here, i'm running Mayrun MR500 235/35/19 front and 275/30/19 on the back, i went in a Touge night and gotta say grip is as goods as it gets. Down here weather is humid and it rains every other day and tires seems to handle pretty good under this conditions. Nice bang for buck