We have a split king too. I was going to stay with a queen, but my other half was more interested in a king. We put the topper on today and I had forgotten how good it feels. We tried it at the store and liked it there, but it has been a month or more since we tried it, so I forgot. Yes, it's a lot of money, but it still came out cheaper than the sleep number bed with more for our money. It will be our Christmas gift for the next couple of years.
I couldn't get warm last night until I figured out that the cold was coming through the mattress, so I had to put on warmer clothes to get warm and sleep. It's set up on the floor until our bed frame comes and we're having our first cold spell of the winter, great timing, eh? I'm hoping the wool topper will help tonight.
We've gotten used to the mattress now and like it. After the first night, I woke up without the usual low back pain and my dh says he has less stiffness too. Now I need to get a pillow to go with it since my neck still gets stiff. I have a contour memory foam pillow now and it feels hard and doesn't work with this bed. I'll be getting a latex pillow too once I can find one that's soft enough, but supportive too.