i have them, i love them and i wouldn't run anything else for coilovers except KW coilovers from Harrop.
Tell us more!
How does the ride and handling change from FE2?
What kind of roads are there where you live?
What height setting are you using?
Did you get the car corner-weighted (opinions on doing this)?
I'm waiting on mine to be shipped now and am like a kid waiting for Christmas.
Also, KW V3 coilovers are twin tube. Twin tube stuff is generally more comfortable but oil emulsification/bubbling (and damper wear) is more inherent to this method (a piston sliding around in the oil and then a tube sliding inside another tube in the same oil). In theory, this means a twin tube design would not last as long as a monotube system (just one piston in one tube full of oil). In practice, I don't know. KW has an amazing reputation everywhere I look.
In both monotube and twin tube systems, a big jump in performance happens when the shocks are gas-charged. Gas charging increases the pressure inside the shock, making it harder for the oil to emulsify/bubble from heat. Shock oil emulsification also turns the damping to crap since the oil/oil bubble mixture flows through the shock piston's valves too easily and let's the spring go through it's natural bouncing cycles.