I've got KW V1's on my Eddy and they're awesome, ride better than standard I'd say, so don't know what KW's you've experienced?
Kw v1 on my old mk5 GTI
Wasn't a fan they were to harsh for me, the car handled well though, ill be going back to bilstein this time round.
....Improved handling is what both KW and Bilstein coilovers are designed and built for. Both brands are market leaders and for good reasons.
However, if they aren't setup properly or you have a back injury or similar, then they won't be comfortable but that's not the fault of the product.