I have my degree in exercise science, I’m a Certified Strength and Conditioning specialist, Ortho-Kinetics Specialist Trainer, and have been training individuals and teams for over a decade now. If you want to level up your hypertrophy training, The Betterfly is by far the best cuff on the market for isolating joint actions. It’s much more comfortable, versatile, and very well built with high quality materials. It will completely open the door for many different variations of isolation movements and truly allow you to target the muscles you want to train and build your dream physique. Chest has always been a weak point for me but I have noticed some rather impressive gains in a short amount of time implementing the betterfly into my routine. If you’re on the fence about purchasing it, GET IT, you will not be disappointed. Of you don’t take my word for it let the EMG comparisons speak for themselves! -Quinton