Interesting. I couldn’t find that one on their website unless it is just the 4-way stretch knit, but it doesn’t look the same based on the pictures. I like it though.
Unfortunately I think independent control would be of high importance as I would likely use it much more than the wife. Plus based on the pictures of the Reverie 7s shows the top of the mattress has the bars that hold the mattress in place on both corners. So wouldn’t the two twin xls for a king with this model require a split Twin xl unless the pieces that hold the mattress in place are removable, maybe they are would actually make sense.