Know nothing about an insta pot, but we love our air fryer.
We like cooking chicken, fish, potatoes in it.
I have done beer battered pickles (my weakness) in one, and every bit as good as in the restaurant.
They are fantastic for reheating appropriate leftovers in. Tastes just like it came out of the fryer.
Less oil, mess, calories. What's not to like.
The cheap ($60-100) ones are okay and will hold up for awhile, but the best hands down is the Philips.
Bad news is that they are $249. new. The trick is to buy a refurb off of Amazon for $100. or less.
That's what we did and it has been fantastic. If you go for one, be sure to get one of the digital models.