You can build the same thing for under $20
http://www.cedarcreeknetworks.com/heatstick.htm
or buy one ready made for $35
http://www.usahardware.com/inet/shop/it ... n/742g.htm
I use one of the heatsticks in my hlt. I have used it a few times to raise the temperature of the mash. It works pretty good for that as long as you stir continously. I get a few grains stuck to the element which in turn scorch pretty bad.
If the one from Williams won't scorch in the mash without continuous stirring, it may not be able to ramp your temperature up fast enough to be much good. I wouldn't risk $179 on it working right until I saw reviews from lots of satisfied users.
Wayne
Bugeater Brewing Company