I eat about 50-100g carbs per day, have for about 10 yrs, eating a paleo-esque high-fat diet. I wasn't overweight but I noticed that my body changed, it is now a lot easier to build muscle and I feel less sluggish and moody than when eating a lot of carbs (for me it was fruit). Also the fat I do carry is of "better quality" (smoother?) and better proportioned than any fat I had prior. Also much better skin since the change.
If I eat a lot of carbs now (such as traveling, sometimes you don't have a choice) I gain weight right away and as soon as I get back to my low-carb diet it drops off with a little exercise without having to eat less or be hungry.
One of the benefits that I've heard about low-carb is that the metabolic shift from carb-burning to fat-burning is that you get great results without being hungry. Once "induction flu" is over you can live this way indefinitely with excellent weight and health. That's been true for us, anyway.