Kind of. I had heard about it, but never ordered the official information. I DID however do the basic thing with my son and we were happy with it.
We did it in a weekend at 25 months. Friday night he ran out of diapers. (got pull ups for night time just so they'd be different than diapers) Saturday we hung out the whole day in the living room. He was bare bottomed and his potty chair was there. We watched the Elmo Potty Time movie over and over (cause he likes it), drank lots of water, ate treats etc.
Every half hour or so I asked if he wanted to use the potty. If he did he went, if not, not.
Sunday we did the same for the morning, then at noon put on big boy undies (gerber cloth trainers) and went to Target. He used the potty there when we got there (I carried a fold-able plastic seat cover thing)and was fine.
Monday he went to day care in underwear with several changes of clothes in case. He had an accident or two at school every day that week (usually waiting for the potty or while playing outside), and after that he was set.
A month later he was waking up dry at night, so we went to undies at night as well.
How many undies you need depends on how much laundry you want to do. I'd buy a couple of packs (3 pairs per pack) of the Gerber ones (the thick cotton undies) now and see how it goes. If you want more, they aren't hard to find. You'll probably need 2 or 3 pairs a day at first.