Wife picked ours out, floor model at the home/garden show that they just didn't want to pack up.
Zero G is a life-saver for me. Even when I side-sleep, the pressure is far better distributed. Massage reminds me of those times traveling across country with my parents, and the motel had those $.25 shakers
We have the split king. It's a pain to find complete sheet sets. I can easily find a King flat, but there isn't always the matching quality/color for the underlying 2 twins fitted. And I always seem to get stuck with putting them on the middle of the beds, which never seem to line up no matter what I do.
Having the split adjustable though, I can be an my position and wife gets hers.