If you use it with a fit bike its great. If you want to collect your angles accurately in a timely manner it works great. Gives you all kinds of data that is useful if the client has a certain issue, ankle, knee, elbow shoulder etc. If the angle is out of the "normal" Retul angle it might be a direction for a fix. However if you plan to use it to measure bike frames for accurate stack and reach it isn't very consistent, (tracing the head tube circumference, to find it's center for reach) . I spent hours measuring the same frame over two days and never came up with the same reach measurement as the actual physical measurement. The measurements were off by 6mm to 2.5 cm. Simple point to point measurements are very close. Saddle height. Saddle nose to center handlebar. Get your stack and reach off the fit bike.

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