I liked the Azenis as a very aggresive daily driver along with the occasional weekend autocross event. The only slight concern I had is interstate driving durring summer rains with standing water on the roads but 'wet' traction is stellar. The tires are no doubt a bit noisey compared to the typical high performance 'looking' tire and they do transmit more road vibrations and inperfections. They honestly could get away with charging a lot more the Azenis RT-215 than they do.
Falken will be producing a new RT-615 Azenis which looks to be very promising. I think the tire will be replacing the RT-215, but I'm not certain on that.