I used them for a little while, and even though they're lined most of the way around the inside, the lip inside the bung hole is NOT. This means that they rust. Not quickly, but it happens within about a year. They're also only good for about eight uses. I recommend a 1.5 or 2.5 gallon Torpedo Keg. Morebeer has them, as do a few other shops. If you're worried about space, you can still condition-carb them and get an adapter that uses co2 cartridges, rather than going with a 2.5-5lb co2 tank. Long-term, it's WAY cheaper, too.