I just got the yardage pro scout last week, I really like it, BUT, at the 3-D range this weekend, I found that I could not range a target through a window. In other words, the target, we estimated at 32 yrds., and there was a window nearly the size of the target, and I couldn't keep the range finder from picking up the tree limbs at 15 to 20 yrds. It is easy to use, but am surprised that it wouldn't range that target.