I bought a siphon to make whipped cream (and other recipes) a couple of weeks ago. Fresh cream from it tastes a lot better than from the store bought canisters. Not sure what the reason is, but I'm guessing the store bought canisters contain additional chemicals to extend the shelf life.

At .50 EUR per N2O load (plus the siphon) it is somewhat of a luxury of course. But if you're into cooking, I think it's a reasonable investment. I'm looking forward to trying a Hollandaise recipe next. It's much easier to make in a siphon than using the traditional technique over a water bath.