I'm curious about the satisfaction level with leg lifting.

With summer slowly approaching and me becoming conscious of my body line, I've been looking into which procedure would be best and am currently researching On-Da Lifting, which is very popular these days. It seems that On-Da Lifting can be performed on the body as well as the face. My biggest concern is my lower back, so I'm wondering if it would be effective for this area. Even with exercise and dieting, the lines on my sides and lower back don't slim down as much as I expected, and my body lines look uneven when I wear clothes.
I would also like to know if Ondari Lifting feels like it definitely reduces fat, or if it is more of a procedure focused on elasticity or contouring. It would be very helpful if those who have received the treatment could tell me how many sessions it took to notice changes!