I have not used this method, but I have home schooled. I personally do not feel that one as young as three or four needs to be "tied down" to a school schedule. They will have to do that soon enough. I think young kids need to learn their letters,etc., but in a fun no-stress kind of way. Your little one has plenty of time for school let her be a baby while you can, and enjoy her. Do not get me wrong, I am not saying she should not learn at 3, but to me it seems everyone wants to get younger and younger teaching these babies. I am trying to enjoy every minute with my 4 year old b/c I know there is no getting this time back. Also, I have done research on kids who go to preschool before Kindergarten, and kids who have not. Though the kids who have been to preschool may have a little easier of a time in Kindergarten, at the end of the school year they are generally on the same level.
So do not stress out, and good luck!