^^ it has to do with the small chambers, if designed well, such as a good carb placement, and a good can, it is harder to get a stale hit, and easier to learn how to use. People often take rips from bongs and choke till they puke, that is usualy not a good hit, granted it gets you wasted. A good hit is sopposed to be pleasent where you taste the herb, and still get a good expansion, and never harsh. Bongs are deseveing in that people have to know how to hit that particular bong or type of bong. With a bubbler its is easy its the same as hitting a pipe. what you are hitting is what you get, with a bong the big chambers can trick some in thinking they can milk it when they obviously cant, this is usualy just a waste of herb (but usualy entertaining). So a bubbler is good for all