The Legacy Cork Pops wine opener, as stated in other reviews, uses gas to force open the cork. It doesn't affect the taste of wine, and is easy to use once you've used it a couple of times and have the hang of it. The end of the unit also serves as a foil cutter. Place over the top, squeeze, and make a full turn and the foil comes off easily. To uncork the bottle, just insert the needle into the cork (without pushing on the canister as you do so). Once the needle is down in the cork, push the gas can on the top and the cork pops! Then using the opener unit, you can smoothly take the cork off the opener with a turn or two. The Cork Pops refill canisters aren't too pricy and worth the ease of this opener. Mine came in a clear plastic case that makes storage easy in the pantry. Once you are all finished, the unit is back in position for putting away and taking out to open the next bottle.