Ok... this is a tough one. We could discuss why you SHOULDN’T try anyone else, but then we’d just sound like a**holes. Truth is, there’s probably a hundred other “coaching” programs you could try out that would “work”.
So first we’re going to define “works”. We could have designed a nutrition program that is custom to your body, environment, likes/dislikes, and goals... OH WAIT, WE DID. We could have developed a workout program that was sustainable and also to your liking, whose purpose was to build the body you actually wanted instead of throwing random workouts at you... OH WAIT, WE DID THAT TOO. But we didn’t stop there. In any fitness journey, there is a third key component that is essential to making it “work” (nutrition and workouts were the first two). ACCOUNTABILITY!!! (You guessed it!) We needed to ensure that you had someone guiding you every step of the way, so that when your friends are giving you sh*t for choosing to work out over binge drinking and watching a marathon of The Bachelorette (or Breaking Bad), your coach is a text or call away to remind you of why you started and to remember that your significant others lust over you will be much more satisfying than wasting the night away.
Bottom line: something that gets you the best results (that last), teaches you how you get those results, and having a coach with you every step of the way, “works”.