Hi Jenny (aka 8675309 LOL. I grew up in the 80's

) It's good to see another "former beacher" on the board.
I'm no expert on FS or EFS, because I just started recently, but what I've decided to do is do EFS for about two weeks and then transition over to regular fat smash. I will also do EFS if I have a major caloric debaucle (like this weekend, LOL. I went out for my birthday...major damage but I got back on plan last night).
I look at EFS like Phase 1 was on SBD...it's probably good for a short period of time.
Hope this helps, and hopefully some of the "old timer" fat smashers will chime in.