For years I've been waking up every single morning with a stiff neck. Sometimes it was so bad, I couldn't even turn my head. The tension and bad positioning would also make me grind my teeth in my sleep. I've tried about 3 different neck pillows and none of them were any good. I read about this one on a health forum. It is such a simple design - no special shape, no memory foam, but it is without doubt the best and most comfortable pillow I have ever used.
It is just the right level of firmness and your head sinks into it really nicely when you lay down. Laying on your back, your head is held low and when you turn on your side it is raised to accommodate the shoulders.
Since using this pillow, the stiff neck has gone - it's such a relief. I wake up feeling really comfortable every day.
The fact that it fits into a standard pillow case is also a bonus. Really pleased with it.