Title: Okay unit, but a few problems after using
Review: I've owned the Garmin 478 for a couple of years and while I've generally found it to be a good unit, there are a couple of problems I've encountered. First, the power/recharge plug is very poorly designed (as others here have noted) and isn't sealed against the elements if you use this on an open boat. Second, and more problematic, is that the unit is held together with small steel screws that have begun to corrode and will over time expand and cause the plastic case to crack. These should clearly have been made of stainless steel. After trying unsuccessfully to get someone from Garmin tech support on the phone, they emailed me to say there was nothing they could do about the corrosion...
Is this product review negative?