Bought one and took it to Florida, did okay but no gold.
Bought another, just the control box.
Just bought another with three coils. I had to replace the battery pack in everyone of them, which is very easy.
I tested them all and the all work great.
I just built my first 10" coil and it works very well!
I only need another set of headphones and I am going to custom bend a search rod.
I will be selling one of these probably when I get back from vacation in Florida.