This classic set-and-forget small kitchen appliance is always in style, thanks to its convenience and ease of use. There are several key factors to consider when buying a slow cooker. First, its capacity. How many servings do you want it to cook? Second, settings. Do you need a basic high/low option, or do you want to use your slow cooker for a range of cooking methods? Third is shape. Oval works best for larger cuts of meat, while round is ideal for liquid or small, uniform ingredients. You should also consider the type of lid, inside material, and handle design. Here are our top three recommendations.