My husband gave me the Coravin Model 2 for Christmas. Great gift, right?!? Expensive gift, anyway. Anyone use it? Love it? I'm the only wine drinker in our home, which is a good thing/bad thing. He thinks this is the answer to me not having to drink a whole bottle in a couple of days. But since I generally don't purchase high dollar wines (everday drinkers in the under $20 range and a few special wines in $30-$50), so I've been content to use a Savino or a vacuum pump system to keep it for a few days. Reviews are generally good-- with lots of complaints about cartridge costs. Worth the cost of the argon cartridges? Anyone had any bad experiences with it?? Keep it or return it and spend the money on more wine??Thoughts? Anyone? Bueller?