ABSOLUTELY NOT! Eddie is good because he got basics from JJ Machado first! Eddie teaches an ATTRIBUTE based system. If you are 10th P and go against someone that has your same attributes, BUT string basics as well, you're smashed!
Look at the top guys in the world. Garcia, Jacare, Roger, Maia, Galvao, Drysdale, Saulo and Xande, and even the American top guys: Bill Cooper, jeff Glover, etc. They don't use the rubber guard and they are the best of the best.
Eddie beat Royler once. I guarantee you it wouldn't happen again. If I shut your rubber guard down, what else do you have. No basic BJJ at all.
Train with Gracie Barra, Alliance, Nova Uniao, Lloyd Irvin, Guerilla JJ, Cobra Kai, Team ROC, ATT, Xtreme Couture, etc. Rubber guard is GOOD IF you have a solid base set of skills FIRST!!!!