I have had the Active Drive on my 2007, 2011 and now 2012 and honestly would not have the X without it but I am accustom to the added stability to the car. Every once in a while (when paying the loan) i had buyers remorse that I may have ticked a few too may options. That was until my 2011 was in the shop for 60+ days and was driving a 535 and then a X5 50 loaner w/ 20's(like mine) and no AD for 3 weeks. It took me all about 2 min to notice the difference.

Minor swerving in the road had much more pronounce body role.
Going around the same corner( 4 years now) at the same speed was very noticeable.

When taking back the Loaner to pick up my new 2012, I did a bunch of swerving, going around corners faster ect. Got the 2012 w/ AD and did the same thing and now I will never have buys remorse on that option.....

The AD give the car a much sportier feel and you can handle the car more like a sedan than a truck.

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2012 X5 50i ZAP(2VA, 336, 465), ZTP, ZPP, ZPS(6VC), ZCW, ZRC, 322, 4UB, 4NC, 610
2011 ///M3 Silverstone II
2011 X5 50i(lemon)
-- SOLD --
08 550 Msport
07 X5 4.8I sport
04 545i sport
02 4.4i sport
01 540I M/sport
00 SL500
97 SL500