Had a go-round with Eagle back in the late 90's with one, globalnav.
Worked for 6 mo. or so fine, then took out - they worked on it, sent back
and it didn't make it one trip. I told them I was gonna start giving them
the kind of advertising they didn't want and they sent me a comparable
Lowrance to replace it, it's still working.
But I think the field has leveled a lot lately, got Garmin and H'bird stuff now
too, and like it a lot.