I have an Elite 5 GPS and I have not had any issues. I have all Lowrance electronics and my only complaint would be with their customer service. Had an issue with my other Lowrance GPS and it was very difficult working with the customer service folks. They basiclly stopped servicing my unit which was only 4yrs old at the time. In so many words I was told tough luck...........buy a new one. I have never owned a Hummingbird unit.