P90X and Shakology?

Hello everyone. I'm starting week 6 of the P90X program and I was wondering if anyone here has ever taken Shakology (meal replacement shake-I'd take it at lunch). People are claiming that this specific one increases energy levels, is all natural and is high in several different nutrients. Is this true for you? Since I will be starting the day with cardio then following at night with the program, does the Shakology work? My energy levels have been down(feeling sluggish when I teach my class) and I do eat a lot of chicken, eggs, veggies and fruit. I do have that last ten pounds to lose and I swear its all in the waist and back area. Any insight would help. This stuff in not cheap but I am willing to try if it does work. Thanks in advance for reading this post.