Mine is mounted to the right of the radio stack in portrait position and I have no problems seeing. At some angles, the sun makes it a little less readable, but I believe that would be the case wherever it was. It is never unreadable. I first had it angled toward the pilot but removed the angle device and put it flat as it was just simpler. I made a bracket that screws to the bottom lip of the instrument panel and has the bottom edge of the GPS flush with the bottom of the panel, so the top is still a few inches below the glare shield. The top is held in place by inserting the power input stud through a hole in a small tab and putting on the power cord. Works great and can be removed in 30 seconds.
Bob Kelly