Under-discussed benefit: being able to have all your clothes actually fit at the same time (no wardrobe scattered between your "skinny" weight and your "fat" weight and rarely being in the right place for more than a handful of pieces to fit entirely correctly) so you can spend up a little on nicer clothes without worrying you'll only be able to wear them part of the time. Worst case, you start to pack on a little too much and they start getting tight, you increase the dose or go back on the drugs for a week or three (or just do it the old fashioned way—hey, it works some of the time, temporarily) and ta-da, right back where you want to be—you're not going to pack on weight and find yourself unable to lose, so buying "skinny clothes" isn't mortgaged against your future success at forcing yourself to eat less.