I have only driven around 100 miles on my setup so far. Spec is: Trophy Dampers, Sportlines, AST topmounts, polybushed front end, and all new ball joints and track rod ends.
You notice immediately that this setup is pretty stiff over standard. I would say a fair bit of ride comfort has gone. However, for me this is irrelevant.
On the roads where I live (the country!) at slow speeds through villages it is quite harsh. Once up to speed it dampens the bumps better, but once you cog it down and drive "spiritedly" it is something else. I thought the standard cup setup was a good compromise between comfort and handling. This Trophy setup is leaps and bounds better in handling. I didn't realise how much room for improvement there was over the cup setup. The way my car turns in is fantastic. It is so precise and holds the line much better than the cup suspension. It gives confidence and I would say a vast improvement in grip. I am running crap tyres, T1R's, and the difference is enough to say you are driving on some fairly sticky rubber. The car feels dainty and almost pin sharp. From the extra stiffness you gain more feel and feedback from the chassis.
These are my first impressions from around 100 miles use. I am very happy with them and cannot wait to get some PS3's under it and a Whiteline ARB so a little more adjustability.
I must add the dampers are still pinned and the car is running around 1.5 neg camber front and 20mins of toe out.