The cork puller works great.

Included in the package is a foil cutter. That doesn't work well at all. The blades aren't sharp enough to cut through the foil, and the blades aren't positioned at a good height above the top of the bottle. Finally, it's made out of very flimsy plastic. This is a minor issue, because foils cutters like that aren't very expensive. But a good-quality one would have been nice.