We had received a Hamilton Beach as a gift a few yeats ago.  We were not very happy with it's performance as an air fryer.  We had been on the verge of getting a Ninja when we received the gift.  We recently decided to give the old one away and try the Ninja.  Wow....what a great decision !  This thing is amazing.  Air fries amazingly.   Love making pizza on the griddle plate.   I can hardly believe the difference in the two units.  We also love the space saving, what a great feature.  Larger capacity and takes up less space.
Thus thing is 5 stars all the way.