Has anyone had (lasting) success taking Alli?

My sister is about to start taking this and I wondered if any Fluther members have had success using the pill. I did search for questions regarding Alli at Fluther and I only saw 2 actual answers to this question. I do know that it makes poo grease if you eat crappy while taking the pill & that one could loose weight if you just eat well…. etc.. I understand that. I just want actual “been there, done that” answers. Thanks!