OH bought me a dream-genii. I hated it to begin with as it meant I couldn't move around at night at all and I found it uncomfortable so I just used it as a long pillow and didn't use the bit for behind (I flipped it over so it went the other way). Then for a while in 2nd tri it was the most amazing and comfy thing ever!!!! Then towards the end of 2nd tri I found it made my PGP (what used to be called SPD) worse as because I couldn't move as much I would get in a lot of pain, wake and then move rather than naturally shifting in my sleep.
It was really sweet of OH to get it for me and I was convinced by their blurb before I got it but don't bother. I've stopped using it and just use cushions now. The dream-genii is cheap quality. The pillowcase is seriously bobbled, the cushio itself is cheap, basic quality - not what you expect for £40!!!!! I do use it like a v-pillow to sit up in bed sometimes but then you have to contend with the back pillow part (it's not removable). It says midwife recommended on it but a closer look shows that it is recommended by midwives as a breastfeeding pillow and I would have thought any similar pillow would be just as recommended.
Get a cheap pillow from somewhere else.