This size works well for my needs. I make 5-gallon batches, and I like to put half in bottles and the other half in this size keg. The only reason I gave this a 4 rather than a 5-star rating is that the first one I bought a few years ago had something wrong with the threads on one of the posts, such that the post could not be removed (no matter how much torque my friend and I applied). Unfortunately, I did not find that out until the warranty was well past. Also unfortunately, our attempts made the post unsealable by retightening, so the keg was scrap at that point. My recommendation when purchasing this and any keg is to remove the posts when first purchased, for inspection and to make sure they can come off for cleaning and be reinstalled properly.