These ovens seem like a decent idea just like the Ronco showtime rotisserie, LOL. It just never caught on. I only say seem because I never tried one and don't plan on it.
I upgraded my black and decker 4 slice toaster oven after 15+ years of service (remember paying $27 for it from Macy's back in 1992 or so) a few months ago with a Costco bought Oster model that cost ~$70 I believe.
This is my counter top oven.
Being a lot bigger than the Black and decker it takes a little bit longer to toast bread but I eat a lot so instead of 4 slices then 2, I can do all 6 at once.
Besides that this thing kicks butt! Saves me gas and energy from turning on my big range oven just to re-heat a few slices of pizza, bake a batch of brownies or cookies. The thing even fits the Tombstone pizza that is 12" or so in diameter.