Am going to weigh in, even though I have not yet dropped my X5 I have lowered several other cars over the years. The ride comparison between Eibach and h&r is significant..eibach provides much more OEM like ride quality without the harshness associated with H&R. I have a freind that had H&r on his x5 with 22's and the ride over speed bumps,pot holes etc was not very nice, but once he switched to eibach It was very comfortable. I will be looking to add Eibach to my SAV soon.