This is a great pillow that keeps form and makes me feel secure at night, which has helped a lot during pregnancy and constantly moving around. I don't really feel a cooling effect per se, but also don't feel like this pillow makes me hotter or radiates heat. So, temp is manageable. It's also a bit bulky and very difficult to wrap up in the decorative knot that they have in advertisement. I often just leave it on the bed as is and have just come to terms with my bed looking less than put together while pregnant.
The one thing I will say is that if you buy the cover for this pillow, it is a royal pain to put it on this pillow. There's a part in the arms that bulges out more, and it's just super rough maneuvering this pillow and trying to get the cover on. It also moves around a lot at night (which is weird cause it feels so tight while putting it on) and the soft top part does not stay put. It's near impossible trying to adjust the cover when it's on the pillow. The only reason I bought the cover was so I could wash it and keep clean, but I oftentimes just want to leave it on cause I fear having to try and tackle this thing to put on the cover. It's also a bit pricey, at around $90 which I think is a bit much for a cover.
Overall I would recommend for women that are worried about being hot and like a firm support pillow while pregnant. It has helped a ton with providing support at night. Definitely will give you comfort, but if you're looking for something to easily keep clean or put away every night after use you might want something different.