I hope you got a 50% discount on this..... which is what I would consider "significant"
I am not about to dump $4K or even $2K on a system so that my car would just sound better without any performance gains.....
Overall thumbs up to BMW for releasing a OEM system but there are much better alternatives out there.
Current: 2016 F10 535i xDrive AW w/ Black Dakota, ZMM, ZCW, ZDA, ZDB, ZPP, 688 & Black Grills.
Retired: 2011 E92 M3 -AW
....ED April 29th, 2010
Retired: 2007 E92 335i -Space Gray.....ED Oct 19th, 2006