4-Burner Outdoor Gas Grill with Side Burner 

Material quality & durability: Prefer 304 stainless steel for housings/burners for good resistance to corrosion.

Heat distribution & burner design: Ensure the main burners can handle even heat and that flame tamers/flame deflectors reduce flare-ups. Example model mentions “Even-Heat System” and angled flame tamers.

Cooking surface (sq. in.): Large area allows you to grill many items at once. The wider the area, the more versatile for families or entertaining.

Side burner output & usability: A good side burner should allow you to sauté, simmer or warm while primary grilling happens.

Fuel type & adaptability: Propane (LP) vs Natural Gas (NG). Ensure that the grill’s fuel type fits your setup. Also, the side burner should match.

Storage, wheels & mobility: Especially if placed on patio or moved. Some models include casters and lockable wheels.

Maintenance & cleaning: Features like removable grease tray/pan, warming rack, side shelves help with usability.