My jawline is sagging so obviously that I'm considering a double chin lift. It will be effective, right?

My jawline has sagged so noticeably that I am seriously considering a double chin lift. It’s not like I’ve gained weight, but it bothers me because the area under my chin feels particularly thick and saggy. It also makes my facial features look dull, so I’m under a lot of stress.

This isn't an area that slims down just by dieting. I'm looking into double chin lifting procedures, but there are so many types that I'm having trouble deciding. Some say Ulthera or InMode are surefire fixes for double chins, while others are wondering if I should just get fat extraction. I'm really confused. My biggest worry is that I might end up wasting my money if I mess with the wrong thing...

For those of you who have received a double chin lift, is there a procedure that you felt was truly effective? Does the jawline become more defined after just one session, or is it something that requires regular maintenance?