For a bit of background, I have conducted numerous preservation tests. My lifestyle prohibits me from opening and drinking a full bottle every night (I'm the only wino in my family, with a new and active baby). Therefore, it's been absolutely necessary to find a better solution than opening a bottle only to dump it the next day due to oxidation. The problem with most vacuum pumps, is that there is no way to know if the seal is leaking or not. With The Wine Doctor, that problem is truly solved. As long as you keep an eye on your bottle and re-pump when the red indicator shows, your bottle and its flavor should be safe and sound! I think this is a great preserver, especially for those weary of the argon gas method.