My mother bought a Farberware convection oven ca. 1980. I think she viewed it as a practical fix--appliance repairman couldn't fix our oven, and my parents found the dimensions would make replacement hard if not impossible. Meanwhile, the Farberware was reasonably cheap at Fred Meyer. The funny thing was that practical fix or not, she grew to love it, and declared she'd never go back to a regular oven. That Farberware was her last oven, although at the end it was apparently showing signs of age/wear.
The only problem with the Farberware design is the size. Some baking pans--particularly large cookie sheets--won't fit. I remember my mother having to "rebuy" at least cookie sheets. But apart from that, it's big enough to be usable for most tasks.
I sometimes see these turn up in thrift shops, and have been tempted. But usually something makes me say, "No." Price too high, obvious problems with the oven, or I'm in a phase with too small a kitchen and too much clutter as it is.