You want fast snuff? Keep dry ice handy, drop a chunk in there over the coals when you're done.
I just hose mine down with the dry powder ABC extinguisher every time...
(no I don't... Don't do this. That shit burns your lungs, and probably tastes pretty bad)
Just closing down all the vents works fine, its what I have always done. The small capacity of the baskets IS kinda nice but not a huge deal. Its like what I do with my WSM, shake some of the ash loose then top off and relight and your good. I pretty much only use lump anyways.