I've tried various soak and sleep, dunelm, tk maxx ones and also one of those groove / easy sleep ones. Currently on Martian pillows from Amazon, but again no good. I'm a side sleeper, need something not too firm but not too squashy. I have a problem with the lower vertebrae in my neck which means I need to have my spine as straight as possible, if that makes any sense! So my head needs to be flat, not tipped down or tipped up by my pillow.