I've had great experience with Colgan bras as well. I have one for my M5 and one for my X5 and the fit is excellent on both. I just returned from a 4700 mile trip from S.F. Bay Area to Mt. Rushmore and pointds east in the X5 and regurilarly cruised at 90 to 100 mph with no problems - I never even had to adjust the thing! I'm very pleased.