Summary: These come standard on the MX5 from the dealership. Had the mk2.5, and felt these tyres were too harsh for the chassis and suspension, so I swapped to the Toyo T1R, which on that car was a far superior tyre. I now have a mk3.5 sportstech, and am hugely impressed with the Bridgestones. The suspension and chassis work alongside the firm sidewalls and excellent levels of grip.
Summary: Had two sets of these in 215/45/R18 on my Spec.B, driven on them hard and driven a lot. They're nearly on par with the PZero Rosso Asimetrico's, however a tiny little bit better in wet and they do tend to squeak a bit on the limit in the dry. Wear out equally fast as aforementioned Pirelli's. Very good performance tyre all in all, I might just get them again.
Summary: Bought these tyres as I thought that run flats would be a good idea on my wife's car meaning she could probably make it home without calling anyone out. The problem with these tyres are they are so unforgiving giving an extremely hard ride. I have just changed them for contis feels so much more responsive straight away.
Summary: Recently changed front 2 tyres as car came with these on the fronts. Grip in dry and wet is suberb and makes the car feel glued to the road. Can throw the car into corners with ease knowing you will smile coming out the other side putting your foot back on the accelerator. These tyres really let you feel the road and give the steering wheel that solid feel. Standing water not an issue either.
Summary: Having covered a good 8k or so spirited miles on these tyres in the last 12 months, I can say that these tyres have little or no redeeming features. The tramlining is horrific and at times can snap the steering wheel sharply from your hand - and I'm no stranger to much wider, slim profile runflats. Moderate acceleration or bumpy surfaces in the wet cause the traction control to kick in constantly.