Though fairly successful in controlled drug company trials Xenical/orlistat, which is twice the dose of Alli is very disappointing in the community. Like most people who try them you will not lose much weight. You would however get diarrhoea, foul smelling liquid stool, abdominal cramp, occasionally faecal incontinence and wind. To lose weight you eat a little less and increase your exercise.
I haven't notwithstanding I will add that everyone who uses diet pills starts off at a different point - weight, activity levels and so on.If you are wanting the information for your own dieting then it is far better not to know what other people have done.