I bought this 2 months ago, I am really disappointed by this range.
Fast boil is a joke , it always cycles on and off even on the highest temperature . So basically I can’t sauté veggies and they become always mushy and soggy due to burner’s low heat.
This also applies to all other burners.
Now the oven , you cook same meal different times  and you set same temperature and you still get different results sometimes overcooked , sometimes undercooked, and sometimes prefect I think the internal thermostat LG uses is sourced from Dollar store.