I built it, I also have one that is 24-site. The great thing about my bubbler is I got the tubs and lids from the Dollar Tree, so to answer a previous question, yes it has a nice tight humidity dome! Go in there with a limit you will allow yourself to spend (like Vegas), you will be picking stuff up you never thought you had a use for!!

So far the lttle bubbler is working great!! Put some bag seeds in a few days ago and they are now 2 inches tall!!
Will post pics soon