Difficulty Level II workouts play an incredibly important role when it comes to fitness. They keep us revving when we don't really want to exercise hard. They provide great workouts for those difficult transition periods when we are beginning to level up and they help recuperation. Burn & Build does not disappoint. It does all of these things and it does them really, really well. Use it wisely and it will serve you well.
Extra Credit: 1 minute rest between sets.