The angle viewfinder does its job well and is not complicated. For the price, it's as good as you can expect or want. The only change I could ask for is clearer indicators to show if the measured angle is left or right of the ideal vertical, as the triangular arrows on this device only point up or down, which is not an intuitive way, to show him. A diagram of an acute angle opening to the left or right would be much more intuitive. It's quite sensitive when tilted backwards (about 10 to 15β¦