I have used all of the features of my new Ninja Foodi grill (grill, air crisp, bake and roast).  Wonderful chicken wings (fresh, not frozen).  Tender baby back ribs - put the sauce on at the end of cooking...  hamburgers, egg rolls.  I use my own probe so saved some money buying the cheaper grill.  The bad reviews that I read may be as a result of buying a renewed grill, not cleaning it properly, not oiling it with a high smoke point oil, putting on sugary sauces that burn.