We put a generic type tempurpedic topper on our waterbed -
the topper pad just makes it extra comfy.
Plus we can turn the heater down and off in the summer since the pad holds body heat quite well.
It may retain too much heat for those summer nights that just don't cool off though.
I've got 2 sizes of the contoured pillows- small and medium.
I had to get the small size when I was having the real bad neck spasms, all I could be comfortable with was just a slight pillow to just support the cervical part of my neck.