We had one at my old work. Came in handy over the North Sea. I tended to navigate with it using the map page + ETA dest, ETA next fix, groundspeed & (I think) dist to next fix. I made frequent use of the E6B functions to get wind info. Necessary for me due to range & alternate limitations when the wind was strong.
I loathed that bloody circular/oval cursor button! I lost track of the number of times I nearly tossed the thing overboard because the cursor would move 90 deg to where I intended. Why the hell couldn't they have put 4 arrow keys on it like Lowrance did for theirs?