I still have one of the square Aromazaps. I bought it years ago, when Overgrow.com was still around.
All told, I bought about five of the units over the course of several years. I have given 2 to friends, including a cancer patient (Rusty, RIP).
They are very efficient. They only hold a tiny bit, though, so you have to keep refilling.
With all of my units, the little metal clip that apparently holds the heating element/ brass tube assembly, has eventually detached. The assembly falls partway down into the wooden casing. With my current unit, it only fell down a little bit, so it can be used with no problem, although hole in the top doesn't look so great. But that was only after years of daily usage.
Ultimately, my consumption increased to the point where I need something that holds more at one time. I also learned that I prefer methods that don't char the outside surface of the dottle.
But the Aromazap was my first vaporizer, and it has a special place in my heart.
So here's to you, Zapman! It was nice to learn the story of you and your wife's venture.