Got the KYBs installed with my eibach springs. The install was very straight forward, no surprises. They looked to be the same exact length as the stock ones, although I didn't look very hard as I was in a rush to get them installed and done with. Also they did not lower my car anymore, as I had wanted. In fact my car sits about a 1/4" higher in the rear, I don't know if they still need to settle a bit?
Overall, I'm very happy with my purchase. The ride is a bit more firm than what I had on there, but not harsh like some mentioned, even with 19's and low profile tires. My rear end feels tighter and a lot more controlled if that makes any sense, although that could just from them being new struts. Also less bounce when hitting imperfections on the road at higher speeds. I think these are very comparable to the OEM sport struts.
I would definitely recommend these, especially now that the OEMs are scarce. For the price I don't think you can do better. I'll keep pushing these over the next couple of weeks, and update again to see if my initial review still holds true.
I would love to know how they do over parking lot speed bumps. I am looking at getting adjustable dampers if I go with Eibach springs. I just hope they make them for our cars.