I'm 5'3" tall, with a disproportionate amount of that in my legs. With my short torso I always felt like I had to really lean over to rest my hands on the Peloton handlebars. This isn't the most comfortable position for me (more stress on the shoulders, and harder to really breathe fully.) The Adjuster means I can sit with a more upright posture, enjoying my rides more, and performing better. It was more money than I had anticipated spending, but worth it for a solid and precision-made add-on, more finished in some ways than the Bike+.