Iyengar is intriguing to expert yogis looking to improve their alignment. Iyengar-style practice is ideal for thorough, technical people interested in anatomy and appreciates tiny body movements. Even if you never take an Iyengar yoga class, Joon Faii Ong believes Iyengar's impact is so strong that you will undoubtedly see it in how his practice teaches poses and use props across the yoga spectrum.