I did WW & SBD before they came out with the core plan.
If you have the SBD book with and use your points calculator you can easily do SBD while counting your points.
I did this because I liked the concept of the SBD plan but needed the portion control I get with the points system and my food log.
If you are interested in seeing how I worked it out I have my old SBD/WW menu's posted in the SBD forum and you can use them as templates to create your own menu's.
http://www.3fatchicks.com/forum/showthread.php?t=39284
The WW core program is also a very good program - if you want to learn more just visit our Core Threads.
http://www.3fatchicks.com/forum/showthread.php?t=39284