I had a lot of concerns about the extra low simmer, and it isn't true that all burners can achieve it. the spiral burner no way. and each of the other 3 btu output burners have widely different low out levels. the simmer on the 2 lower output burners does a good job, the 2 high output burners are only ok but only for a very large pot, and the dual ring is either the HIGHEST OUTPUT or on low the LOWEST output - so I find I'm moving pots around. The spiral 'wok' burner works well with a wok or other pots and does not have low simmer. Overall, this is a terrific cooktop with lots of flexibility and features and is a good match with my other Cafe appliances.