I use mine a fair bit, great for a cheeky fish finger sandwich. It’s really quick, if you’re cooking sausages then the fat drains down into the bottom.
Apparently you can bake cakes in them but I haven’t so far.
For a fake McDonalds I part cook some quorn nuggets (nobody seems to know they’re not meat) and then add some frozen fries for the last five minutes. Yes it’s not the healthiest but sometimes who cares?