Owned H&R for over 2 years now. It is single best investment for handling improvement IMHO. My car is resolutely flat through turns, braking and acceleration. Initially the car feels slower because of less pitching and leaning going on.

As for the ride, it does get firmer. It would be similar to cold winter mornings when shocks and bushing are all stiff with stock spring. I don't mind the increased ride stiffness however.

Highly recommended in conjunction with high performance shock absorber(Koni, Bilstein..,)