I bought this cushion in August 2013. In fact, it is the best pillow on which I have ever slept. Even the much vaunted water cushion can pack as (have a few time tested). Until now (Mai 2014) I woke up with neck pain not once.
It is the perfect pillow, I can recommend it to everyone.
Update February 2015: I still sleep perfectly in this pillow. I bought later now this 2 pillows for extra beds.