I take Abilify and have not put on weight though it is early days for me. Some do gain weight but for many I've heard it is weight neutral. It works well for me but seems to take days to have the desired effect. I take it for agitation, irritability and psychosis. Since starting it (again) Sunday the hallucinations have gone (after 3 days) and since being on higher dose the last two days my agitation is calming down slowly. Hoping over the next week I will feel better.