I've had them on for about a year and generally like them. They're not going to address the floatiness you describe, but a good set of dampers will.
I went with this kit for the adjustability and the ability to retain EDC and it's a good thing that I did, because mine sagged quite a bit since the first week I had them on. At least you have the ability to adjust the ride height back up with these instead of just dealing with whatever ride height a standard spring alone would give you. Plus you'll have a somewhat tuned and shortened bump stop to go along with the KW kit.
The ride is nice and very comparable to stock (...maybe 10% stiffer than OE).