Definitely worth it. If I can only afford to have one option, this is the option I would get. And from talking to a shop owner who sell 3rd party HID xenon kit, none of the aftermarket HID xenon kit come close to BMW stock xenon light in term of quality, price and warranty.
2013 F30 328i Alpine White Sportline / Black Leatherette / Tech / Xenons
2008 Acura MDX Aspen White Pearl/ Tech
2006 325i Alpine White
2003 Z4 Silver 2.5i SMG