Cumbersome handling of little comfort.

There are better alternatives, even here on Amazon (this is my second water-pillow and undoubtedly the worse!). It is a mix of small air mattress and mini waterbed. The Aufpusten and filling of the water is a little time consuming. Bought as a travel pillow, it is relatively large and unwieldy; but it takes away a lot of space in your suitcase.
Comfortable sleep I would characterize as mediocre. The air chambers cause a hardness that can feel a strefenähnliche wing loading in the head area significantly. There is a feeling as if you sleep on bar. The neck area is not particularly supported.
My tip: Try it, and if necessary return. Maybe it fits better with other heads yes.