there is a special price on the release of this product.. so price in europe for me was 1399 euro instead of 1499 euro - but if you order from the US or outside europe you should get additional 19% tax relieve..
I used the following installation instruction - it was really easy (secont post is in english):
http://www.bmw-syndikat.de/bmwsyndik...l#Reply2426017