seeing in previous reviews, I have hesitated before buying this cushion; However, if you know what you are buying, c is to say about a 1kg bag with a firm hold, you will be delighted. in 2-3 seconds you model a head your neck, and your position will be ideal. much less pain, stiffness in the upper back, standing up, nothing to do with usernames ergonomic cushions has preformed foam, too thick for me. the pillow is a bit cheaper than others because some are filled with 2 kg of buckwheat; in my opinion the abel franklin cushion is filled just what it takes not need to add or remove.