We use the coatings now for two years and are completely satisfied with it. We bought the coatings, because my wife has got more and more problems with itchy eyes or sneezing much when you stand up. Since we have the covers, that's no longer an issue. Excellent.
The covers fit like a glove on our mattresses and they are not noted. I always think only of the remuneration if the clamping bed sheets to be changed.
Therefore, for me the references a strong buy recommendations