Car is mostly used for spirited weekend drives and track days, the dry grip is superb, steering feel and feedback were spot-on... some progressive smearing though as heat builds up on the track. I've had those right after Goodyear F1 Asymmetric (1) on my front axle (FWD) and the SC5 felt much more purpose built in the dry. Surprisingly the tyres are not that noisy considering how sticky they are.
As for downsides, they can wear out quickly... lasted six trackdays on my front axle in desert-like conditions (extreme heat) before shredding the sidewall. Never drove with them enthusiastically in the wet knowing their purpose...
I'd definitely recommend them if you intend to use them in dry, beware of the wear if driven extremely hard.