Ed Huntress wrote in
:

http://www.nxtbook.com/nxtbooks/fabs.../july2014/#/14

I played with one at the Eastec show about a year & a half ago. I've never
done any welding except O/A about 50 years ago, and it was very
interesting. I did OK for my first weld, but clearly need a bit more
practice. It provides real-time feedback on what you are doing wrong, and
I was improving as I went.

Definitely a great gadget for a vocational school.

Doug White