I just purchased my second set of these tires for my V8 Miata. The car is driven 90% of the time on the street and 10% of the time on the track. The Hankooks have served the last two years as my street tires (I use shaved RA1's on the track) as well as standing in when I need a rain tire on the track.
When relatively new (under 2000 or so miles) I have found them to work very well on a wet track. Until they hit the 10,000 or so mark they were fairly good in the wet on the street as well. In the dry they are simply the best tire for the price you can buy. It was not until my current set literally wore down to the indicators that they started to become scary (and fun in a way) on turns. They are sensitive to outside air temperature, although the sensitivity becomes more pronounced as they age. Again, for the first 10,000 miles they were pretty stable unless the temps dropped below freezing. After that they start to get funny even at higher temps. Do not drive them in the snow.
I will keep buying them until they stop producing them or someone else manages to manufacture a better 15 inch low profile tire at this price point (unlikely) in this size (225/45-15). If they made them in a 275/35-15 I'd name my first born after them.
Good job Hankook, keep up the good work,