I have them on my E36 as street tires. Only had them for about 1,500 miles, but I think they are fine for normal cars, but on a high performance car I don't think they have the grip you would want.
Current: '13 E92 M3 Euro Delivery 9/4
Wife's: E39 M5, E36 M3, E30 M3
Gone: E86 M Coupe