Staggering! These are the best tyres I have used on my Impreza's. I have used Goodyear GSD3's (V-pattern's), Falkern Super Steel 595's, Toyo T1R's (terrible), Goodyear Vreddie's, F1 Assy 1 (soft side wall), Pilot Sports (vague due to soft side wall, although grip levels are unmatched)
I went from the T1R to the AD08 and whilst in the tyre fitter's it was obvious seeing the two side by side (the T1R's had only completed 1K miles), the construction of the Yokohama was far superior. The carcass was very solid - sidewall and main tread part. A friend who was with me joked they hardly need inflating.
First drive out (120 miler round Shropshire's finest B-roads) was a revelation. Basically they seemed to totally sort my Type R Impreza. Turn-in is laser sharp with good feedback. General road feedback was good too, allowing a more fluid, connected drive. Grip levels (dry) are brilliant, all the way up to the limit. When the limit is reached there is a wide amount of safe, easily explorable progression. There's no sudden letting go.
The shoulder's of most tyres would be showing signs of wear after about 1K miles (car only used for blats out), but the Yoko's have not worn in this manner, and after 5K miles the shoulders are still completely intact
In short I am very impressed with the tyre, they do everything you could want from a tyre and do it well. They seem to suit the Impreza very well indeed. Highly recommended, and will buy again