This is possibly the best thing my husband and I have bought for ourselves in a long time.  It cooks beautifully.  I haven't used my oven since we got it. And I know we are healthier for  air frying besides everything being delicious.
BUT, gentle cleaning with soap and water doesn't get the built-up burned-on grease cleaned out from under the rods or off the walls on the inside. Are those rods removable?  
Except for the cleaning issue the Ninja would definitely get 5+ stars.