I have heard that there has been some fantastic success with these especially for drift but am yet to chat to someone in WA who has had success in grip but i would be keen to and also find out how they did it. I may have made a mistake but at the time the decision to change has been rewarding for me.
My previous R33 was quicker with bilstein struts and king springs. This car once changed over to the bilstein coilover setup was much much quicker but more importantly was 200% more stable and predictable. It was able to keep a big horsepower r32 GTR behind it for 3 laps.
But are opions are like aholes, we all have one!
My 2c is that a great suspension setup that suits you will beat a big hp setup most times when it comes to circuit.
On the street the HSD's were very stiff and extremly hard to read. My new setup for me anyway is much easier to read and more responsive to simple changes like tyre pressure adjustments.
I will report back in approx. in 6 weeks once i have the new swaybars, camber, caster and pineapples installed along with all new bushes all round.