The dude pretty much nailed it.
I prefer teh double apple shisha, it smells like jolly ranchers and is delicious. if you decide you want to get VERY silly, fill the bottom up with ice cold vodka, you will get hammered in a hurry.
It is hugely important to clean it each time right after you smoke it. if you let it sit, the shisha hardens up and you just about have to chisel it off :(
also, don't clean it over anything you care about. if you've been to college you know what bong water smells like, and hookah water doesn't smell much nicer. anything you spill it on will smell like that for months.