Generally, when someone says that something is “the best” it means that it’s the best for them. It doesn’t mean that it’s the best for you. If your buddy has been training for 10 years and you’re just starting out, his workout plan probably isn’t going to be ideal for you. Your goals, experience, free time, injuries, diet, stress level, sleep quality etc will determine the best workout split/routine for you. This graphic gives you a starting point.