Seems to be a good range after 3 weeks of use. Knobs are well made with female metal inserts where the stem inserts. Largest burner brings large pot of water to a boil quickly.  Oven works well, temp probe works well. Be aware oven fan is always running, even under conventional bake, which some people may not care for due to the humming sound.  We find it tolerable, if unusual.  We assume it improves temperature uniformity. Minor complaint is the beeper tone is too piercing. I wish mfr.s would make controllers that featured some beeper choices.