Unfortunately I didn't order the adaptive dampers. The option wasn't available on the spec sheet, and when I asked the sales person about it, he said you don't need it as it's more for people who wants to go racing. Now thinking back to what he said, I think he just gave me the standard sales person bullshit - he probably didn't know and didn't care, and just wanted me to buy the car.
The difference between my M135i and E90 is quite noticeable - and the E90 was known for a bumpy ride given that it had the old style runflat tires!
It is partly my fault for not pushing the sales guy and try to find out more. But as I have found out time and again, there is not such thing as sales service here in Hong Kong.
By the way, how much was the AD option?