Losing on EE is just as good as on red and green, so much so that SW are strongly encouraging all new members to start on EE. I lost all my weight on EE and so did many others here - there's no reason to doubt it! SW wouldn't risk their reputation by offering a plan that doesn't work!!!
There's a post on the main forum by Squiddie that explains how it all works, but it's simple really and means you can have unlimited pasta and (extra lean) mince in a meal. Any questions, just ask.