I use these primarily on the track for DE and also driving too the track. On the road in the dry, they perform to a high level in all situations. In the wet, as in heavy rain, they are stabil and predictable, but obviously have less traction than in the dry. I have driven home in two very heavy down pours and at hiway speeds I felt comfortable on them, which was a surprise for so an aggressive/track oriented tread pattern.
On the track, they are totally predictable in the corners. When you begin to drift a bit, they throttle stear precisely as directed. You can break them loose in the corners with over aggressive/incorrect throttle, but they grip as soon as you do your part. They are not Race Compound tires, but I am able to hang with many drivers who have R Comps! That says a lot as a am a thinking, but aggressive driver on the track. They have worn well so far considering the abuse I have dished out. I have approximately 20 track days on them and have tons of tread left. They do require proper pressures on the track to obtain the best cornering grip, but that is the same for any tire, race compound or extreme summer.
All in all, I love this tire and will buy them again. They outlast race rubber by far so cost wise, its a no brainer for DE. You do give up a little cornering grip versus full on race tires, but for DE, these outlast two sets of race tires and then some.