i had the "fullworks" kit fitted to my WRX and im close to doing something similar with the ER34 soon.
I was really happy with the kit. Ride wasn't bad, passengers would often go unnoticed of the firmer ride on distant trips (to the snow for eg). Going through the nasho, the suspension was never unsettled by the bumps - everything just worked well.
on the track, the WRX had *better* turn in, considering its an AWD car and camber settings were totally nuetral (i went for best tyre wear ), but it had a tendancy for oversteer with some throttle control. i was managing 1:12's on RSpec tyres in this configuration but with some more tuning to camber i reckon i could've dropped by another 1 or 1.5 seconds with better turn in...