I have them on my e90 330i and love them. They are incredibly smooth. I have the first gen brownish orange ones, there is a newer revision. I also bought Swift springs from harold at HPA. Here is my car. http://www.e90post.com/forums/showthread.php?t=768726
There is some info in that thread about my setup.
Originally Posted by TheJacka
I am considering these CKS Coilovers with Swift Springs but would love to hear from anyone who has this kit on their E9X. They are praised well from the F10, E60 M5, & E92 M3 guys but I can't seem to find much about our cars in specific. This is the same kit MFest Chris has on his M5.