Based On 2 reviews.
Great unit, wish I had purchased one sooner.
I must address the previous review that is in error. The degree scale is a must due to the different sizes of elevators, ailerons, etc. A measurement in inches or millimeters would only apply to one size model...i.e. a 30% throw on a 30 % airframe might be 2" vs. a small foamie might be 1/2". Know your physics.
Extremely well made from aluminum, clip is strong yet will not damage surfaces. Scale is easy to read being white letters on black background. Only drawback needs to have scale in inches/metric as most manufactures give deflections in inches/metric. Degrees are great for fine tuning.