I gave it 4 stars because it's difficult to clean the inside. It would also be better (in my opinion) with digital readout for time and temp, as it is a bit difficult to be sure you have those exact.
Other than that, I love my air fryer. It holds enough food for the two of us with no need to stir, and it's so quiet. 
The basket isn't non stick, but soak it in the sink for a few minutes and it cleans up great.