Has anyone experienced a sensation of heat on their face after the Ondari Lifting procedure?

Lately, I've been stressed every time I look in the mirror because of my double chin and sagging cheeks. People around me have been highly recommending microwave Ondari lifting, saying it's painless and feels as cool as an air conditioner. However, I heard that the cooling system keeps the skin surface cold while delivering high thermal energy deep inside. After searching through posts on online forums, I saw some reviews mentioning that a throbbing heat sensation lingers deep inside or redness doesn't go away after the procedure. Hmm... I'm wondering if there's a possibility of side effects, such as burns or blisters forming inside the skin, if the procedure is done incorrectly.

My skin is thin and sensitive, prone to redness, so I'm not sure if Onda Lifting is safe for me. I've heard that it's usually administered using a level 3 or 7 microwave tip; does the probability of side effects vary significantly depending on the doctor's skill during the procedure? Since I'm spending a significant amount of money to start this treatment, I want to ensure my lines are clearly defined while staying safe. For those who have recently received Onda Lifting at a dermatology clinic, did you experience any discomfort after the procedure, such as skin irritation or pain?