Re: how tall?
My Black Rock is 22". It breaks down and cleans exceptionally easy. Smokes great, too. My QT is 13" and needless to say it is an easy clean as well as a classic Mya smoke. Love them both. I'd like to get a tall hookah but seriously it would only be for the aesthetic aspect of having one so I'm not in a rush right now. Smoke happy.
Al Fakher Large Solid and a bowl of DM . . . life is good!