I used the IceLink Plus, which was the prerunner of the Dice product, on my E53. It worked well, I had very few problems, once it was installed and updated with the latest software.

There are multiple options; the Icelink/Dice, the BMW Ipod kit, and the BMW auxiliary input. The first two show song titles and let you use steering wheel controls, as well as charging the Ipod. The auxiliary input is just that, a phono plug input, so it doesn't show song titles or have any controls, and you have to rig up a charger for the Ipod.

Lots of articles on the X5world home page on these and other options, including how-to install instructions.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue