As you will have determined from the above posts, there are two groups of BMW owners. Those who have comfort seats, and will never go back, and those who haven't tried them yet. Add another vote for comfort seats here.

No opinion on the rear climate, but if you have most of the other options, why not?

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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