Hi
I fitted some twin tubes to my ed30 about 2 weeks ago, and have to say that, although my 1st set of coilovers, seem to be a fantastic kit.
I've run sports dampers and lowered springs before, and found the ride to be quite hard, the h&r's haven't made the ride much harder under normal driving, but when driving fast road, the car feels very grounded and has reduced body roll.
I've driven my mates ed30 with h&r lowering spings and found that to be a harsher ride that the twin tubes. Although he does have updated roll bars as well.
The kit is very good quality and would definitely recommend it.
I'm running the v1s which are ride height adjustable only, so can't comment on the v2s with adjustable bump and rebound and how they are when specifically tuned.
Hope this helps.
Cal