We have tried various systems and actually already given up. Then I saw on TV, like a sommelier used the system. Then I bought the product. In fact, smelled of rubber stoppers to rubber, but that was after 1x dishwasher off. We tested with reds to 10, each with a glass before and after application in Blinverkostung. The difference was clearly positive for the system. For wines medium category by 20-40 or older wines also a positive difference was to taste, though not as significantly as in the young wines, which is to be expected. The system works very well with us dripping nothing when turning the bottle (Tip:. The movable rubber band over the gap between wine bottle and decanter stripes Probably it is so thought, otherwise it would not be displaced) and best of all, the wine wins well within 2 minutes. In everyday life, you open a bottle usually spontaneously and has no time to ventilate adequately, but the system makes spontaneous wine enjoyment possible. For wines with a distinct deposit rate is however not suitable because the depot is shaken up by turning over. But for the vast majority of wine is perfect, especially with still rough tannins. I'm going to buy more and give to wine connoisseurs.