I installed one last week. Flew 2 hours with it on its 1st flight. It lost GPS intermittently through the flight for a total of around 1 of those hours. Also getting an error selected course / DTK mismatch. The screen and faceplate runs very hot; I am unable to touch it for longer than about 5 second intervals without burning my fingers. Tech support said GPS issue was related to my GA-35 antenna being mounted on a shelf in the empennage when the install manual mandates external mounting. No answer to why it worked fine with the 430w.