Had them on my 2008 X5, but not on the '07 X5. Had them on my 08' and '09 ML63 AMGs. Didn't have them on my Range Rover, but have them on our current G55 AMG.

They are a pain in the ass, if you do not swing your leg out a bit when exiting. If the car is not perfectly clean & you have light pants on...they get dirty or wet. Entering the car is easier with them...if you, and/or a passengers need to step on them.

I think I would get them again, but they can annoy though!