I think you really have to watch the portions on this diet. I did Phase 1 and did not loose a single pound! Talk about being dissapointed

I only ate till I was satisfied (certainly never stuffed!) and followed it to a 'T' but I still did not loose a single pound. But I LOVED the way I felt eating this way, I had more energy and was hardly ever hungry and important for me, it kept my blood sugar stabilized. I normally easily lose weight so I was shocked when I stepped on the scale and not a pound had budged.
I also really like WW so I have decided to combine the two

I have always lost weight doing WW so I know it works. I pretty much eat the South Beach way (with more carbs but not too many and only low glycemic ones) and stay within my point range that way I know I am controling my portions and will lose weight.
Hope that helps some from my (limited) experience with SB. Now after having done SB I do wish the book would have gone into more detail on "how" to eat. I know others have complained it was not detailed enough as well. I did not care for Atkins (lasted one day on that....lol) but I did like how detailed Atkins books are, hopefully Dr A of SB can do the same in the near future.
I really believe in the SBD though, I think it is extremely healthy (it's very much like the mediteranian diet IMO) and I really liked how my body felt while eating this way!
Skinnymini