I've done this. Not much to watch out for from what I remember other than the tight squeeze to get them in and out.

Although less functional in terms of lumens I like the output of 6000k better. Just looks nice and now matches my M

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2008 X5 4.8i BSM/Blk - premium, sports with 20" 214s, navigation, rear climate, adaptive ride, dark bamboo, running boards, 3rd row seats, USB audio, high speed maximum, etc etc

Mods: Smoked reflectors | Hoen xenon match fogs and angel eyes | LED plate bulbs | 18" winter wheels

Other vehicles: 2002 M3 Vert TiAG/Blk - with every option and many mods | 2009 Chevy Silverado LTZ - fully loaded