Gerren is one of my favorite 30/60/90 instructors. He is engaging, tough, and motivating. Gerren doesn't let you skate by in the class and isn't afraid to push people past their comfort zone. There's no hiding in his class (trust me, I've tried and he's found me). I love how Gerren pushes the crowd to do better- whether it's jumping higher or grabbing heavier weights. He's one of the few 30/60/90 instructors that encourages you to grab heavier weights and at least try using them. He also is very attentive to form and moves around the class to correct movements. Gerren also offers alternative movements to people that have physical limitations. He's a great instructor and really knows how to take an already tough class to the next level.