Ye I agree, really love it! Was going to put one on anyway, but the car I found already had it installed. Many on here aren't particularly keen on it, but if we were all the same it would be a boring world. More form than function, think it suits the lines really nicely with the two flaps following the lines of the roof and bonnet. Very subtle and in keeping if you ask me!
Theres a recent thread here:
http://www.z4-forum.com/forum/viewtopic.php?f=9&t=31322&hilit=spoiler