I have used a beer gun, the OG Tapcooler and the new one and I like the new one the best. I never got along with the beer gun even with bottles or growlers. I always had foam issues. The OG Tapcooler can filler for me was OK but I had some issues getting a good seal on the top of the can and I ruined a fair number of cans by rolling the lip trying to get the can sealed. Others may have had better experience, mine was an early model that I got as soon as they want on sale. The new one, while requiring a mounting system, works just better for me. It grips the can under the lip and pulls up against a gasket. I will try to get a picture of how it works. Once the pressure and vent are all set after a can or two it works really good and I can get several cans filled quickly. I still lid on foam because once you release the can there is a buildup of foam that happens.