I did alli, and it worked great for me. Mainly what I found, the main benefit, to the pill is your willpower....if your meal contains over 30% fat, you get those lovely treatment effects, and you don't want those, so if you have no willpower and you'd like some help telling you when you've eaten over that alloted fat amount, the pill definitely will let you know....through a nice oily discharge - ahem. which, by the way, is why you want to start taking alli on the weekend, when you are home, and near a bathroom. And don't wear white either LOL. So sorry, it actually is quite funny, but yes it does work. If you are already eating a low fat diet, and have great willpower, alli probably isn't for ya, as per the website. but if you need help in this area, alli can give you the - um - "incentive" to make healthy choices. It is the over the counter strength of the rx drug xenical. In a nutshell, that's Alli.
Hope this helps!