I second the notion that the post-sale service can be poor. I had to send four Autohelm instruments to Raytheon b/c the displays would fade to nil if the backlighting was turned on. $50 per instrument later and I was back in business.
However, the person I was assigned to at the NH service center did not speak English, French, or German. Hence, I had a very hard time communicating. This was very frustrating...
But, I have not abandoned the brand either. After all, the competition doesn''t offer longer warranties and the folks at Raymarine have redesigned the Autohelm junk to last longer. Furthermore, for that kind of money I''d rather install a radar/chartplotter.
Thus, as the ST-50 gear on board wears out I am replacing it with ST-60 gear, which will hopefully be somewhat more robust (and water-proof!)