As far as cooktop and features,5 star. The deduct of a star has to do with cast iron grills that cannot be totally cleaned. Instructions say to immediately clean..doesn't work. Tried 6 different cleaners and 4 different cleaning pads. Nothing worked. After 6 months bought another set of grills and had a porcelain finish put on them. no issues now. Most companies use to have porcelain finishes. Not know. Cost is the factory.