What are the recommended number of sessions and the cost for leg lifting?

I'm looking into lifting procedures because my facial contours seem to be sagging and my jawline looks round. I heard that On-Da Lifting uses microwaves, not the ultrasound or radio frequency used in conventional lifting treatments. I didn't know what microwaves were, so I looked it up and found that they work similarly to a microwave oven. Since the microwaves in On-Da Lifting simply pass through the epidermis to deliver heat directly to the dermis and subcutaneous fat layers without irritating the skin, it regenerates collagen and destroys subcutaneous fat accumulated in the jaw area. I think this would be helpful for someone with thin skin like mine. I'm even more drawn to it after reading reviews that say there is almost no pain or downtime—to the point where even anesthetic cream isn't needed—allowing for an immediate return to daily life. However, the problem is the cost. How many sessions would I need to see results with On-Da Lifting to improve facial elasticity and refine my jawline? Also, I want the cost to be manageable for the recommended number of sessions, so I'm curious about the price. Could those who have recently received On-Da Lifting please let me know what the average cost is?