Bests & Worsts Reviews from Amazon

User manual is vague, incomplete and fails to mention that you need to purchase the app with on line classes in order to get total control over the resistance mechanism and to get any statistical information. I have been a spin instructor for over 15 years and wanted a quality bike for my home. I don't want or need on line classes for my workouts. Much to my chagrin, I found it impossible to make subtle adjustments to resistance and had to turn the knob several times to get any response at all. This is nothing but a money gauge from the company to get purchasers to pay for on line classes. This negative feature is not disclosed in ads or literature and makes me feel the product is being marketed under somewhat false pretenses. Returning it is a royal pain, but I would NOT buy it again.