I gotta question how well it works. It says that it can take your wort "down to 35F below ambient IN A MATTER OF DAYS and hold it there". We all know the first 2 or 3 days of fermentation are really critical, in terms of temp control. Seems that there would have to be a lot of trial and error, to be anywhere near as accurate as just setting a controller on a fridge and letting it go.