They dont work really well. Its just so hard to get the right temp. Just pay 50 and buy a nice digital one at gorillaglass.
Yeah it looks a bit complicated, and not really worth it. Spend some more money. At least the price you save, however is $4.20.
Astrofabrical has one. He said it is the same as a lightbulb vape, as you can tell from the pics. Definately a waste of money.