My wife bought one, which I thought was ridiculous. Here’s my short review.
It works exactly as advertised. Did we need a giant toaster oven when our regular toaster worked just fine? No. Do my double ovens work just as well to heat/cook food? Yes. For us, was this a waste of money? Probably.
The pre-made food: It’s… eh. Not horrible. Not great. But for the price, it’s not really worth it.
In short, if you have a functioning over and a toaster, you don’t need this. But if you had, say, an in-law unit that didn’t have a true kitchen? This would work way better than a basic toaster oven.