So far so good.
I have used genuine down pillows and bedding most of my life--but they have their problems--washing and drying most particularly and overtime they wear out. Recently I started looking to synthetic alternatives which has worked out for the most part. It may be important to note too that while this is not my highest consideration in bedding, the synthetics wash and dry much more easily and quickly, so may represent an energy savings. As for these pillows I purchased each grade of firmness thinking that they would correspond to down firmnesses--not so, these pillows are much much firmer than expected, but so far so good. I am returning the "firm" without even opening them though. It could be that they "calm down" after time, but this is an early use review. The nice thing is they feel clean and I can throw them in the washer/dryer and think they will do just fine and come out clean again and puff up without hours in the dryer like down needs. (Yes you can put down in the w/d and it will do fine as long as you dry it thoroughly--if you have the time, funds, available alternatives, and such an organized life that you can dryclean all your down--this review does not apply to you....) So I think these will work, they are certainly comfortable so far.