This is a great product. I use it all the time. Occasionally I have to fall back to a manual opener, but that's maybe one bottle out of twenty, if that.
Some here complain about the cartridges not lasting. Simply push the button for only a quarter-second, and let the pressure do the work. I suspect some may be holding the button down until the cork comes free, which is far more than you need.
Also, if you turn the bottle upside down for a couple seconds before inserting the needle, you'll leave some wine between the base of the cork and the bottle. This will seal the pressure better, and it will get forced up between cork and bottle by the pressure, acting as a lubricant. (More needed on white wine, which you might have set upright in the fridge to chill, for example.) Once I discovered this trick, almost every bottle opened easily.
Once armed with these tricks, you'll get a lot of good use out of this tool.