Yup- Main issue is they don't last as long as actual kegs. With proper care and cleaning, you can get I'd say 6+ uses out of a keg easy. Most, and I, would advise natural carbing, and just use CO2 for pushing your beer and maintaining carbonation. Those little CO2 cartridges will add up. Check out philtap, avanti mini pub, and I believe party pig for some serving ideas. There's DIY ones as well, just search for mini keg. Let us know if you need more details!