I've done it and what I do works. I didn't follow that program though, I just decided that it was time to do it and I was taking them to the toilet every 10-15 minutes or so whether they thought they needed to go or not. I wont say that by the end of the 3 days they are well and truly 100% toilet trained with no accidents at all, but you can certainly get them out of nappies in that time and well on their way to being 100% toilet trained. It wasn't till after I got my last child TTed that I even knew that there was a 3 day proram LOL. The one thing I would reccommend you do is to not plan any big outings in those first few days while you do it. It makes it easier if you don't have to resort to using a nappy for anything other than a day sleep and bedtime etc.