Good ones arent cheap!...I have a....hang on.....Ok,..Mines a "Digital air Vapir ONE"...I'd say its really good, however, I dont know what the best temp is...Some pots are called for using higher or lower temps...too High, it smokes and chokes...too low, the vapor wont hit you hard enuff...I hate choking...Theres a centigrade temp written on the bags but still, its a toss up...Even I need info on what temp to use!..I wanna just turn it on, bag it up and breath it!....But, nooo, some things are just made difficult.