I switched from Atkins to SB over a year ago. I know many who have. Just get the SB book, and read it before you jump in. Keep your starchy carbs at about two to three a day, and mind the avoid list, and you should do fine. I have one friend on another board who did Protein Power for a long time, lost about 80 pounds, and stalled for months. She started on SB two weeks ago, and lost four pounds this week! It does work! Read labels, and familiarize yourself with low GI choices, and you will keep that 20 off, and lose whatever else you want to lose...

Good luck!