I love my toaster oven! I got mine for $20 so it's probably one of the worst kinds you can get and I still think it's great.
The only trouble I've had with mine is when I cook biscuits in it, I have to watch them close because the tops are more likely to burn. That could be user error, though
I think everything is pretty capable of going in the toaster oven. I've made muffins, cookies, meatloaf, chicken, etc in mine. Just make sure the baking sheet/dish fits in before prepping your food in it
Lesson learned the hard way.
I haven't had much luck with the microwave, either. If you get any good tips on it, I'll try to steal them.