I have had Rainsport 2 on the family estate. I found them as follows -
Wet weather - excellent
Dry weather - very good
intermediate (drizzle, say) - below average, excessively slippy
And, I found they wear pretty quickly.
I've put Goodyear efficient grip performance on the front as a stop gap until they all wear down, then I'll probably put some firestones on. These aren't generally highly rated but I've had a number of times and always found then really predictable, which means I'm in control. Dunno if I'd put them on my coupe though!
Rainsport 3's are supposed to be better than the 2's but after having the 2's I don't think would try the 3's really, but as I say, when it's absolutely lashing it down they're excellent, but then how often do you drive in those conditions?