G$ I have one of them and well . . . you get what you pay for. Absolutely no way to control temp. There is a hole on the botom with no way to close it down.
I am thinking of modifying mine by making somthing that I can open and close the vent with my foot. (it doesn't have the legs like the ECB).
Last time I used it I got two pieces of wood that I was ablt to fight in and out of place to help keep temps.
Just my 2 cents.