Hi mate, i run 1.3 neg camber using the H&R bolts...i think 2 degrees may be a little excessive for a road car, try around 1.5. Camber really does affect handling on the road, mine feels a little twitchy as a result and straight line traction/braking is reduced but not particularly noticable on mine. However, on track the car feels awesome...camber brings much improved grip levels in this environment. Rear can be shimmed in order to adjust the camber.
Im thinking about taking mine to northampton motorsport to get it properly set-up as i wasnt too confident in kwik fits ability :-( Want to have it corner weighted and my coilys set-up properly as im getting a bit of bump steer at the moment also.