Its display of the contour lines was using too large of lines, so it cluttered the map.
It did not display coloured areas the same as in MapSource or as on my GPS Map60csx
Its clutter filtering was either too much (meaning no terrain) or not enough (too cluttered).
I found the tracks and waypoints way more of a pain to manage, as it is primarily a road GPS.
I purchased one from best buy, took it home and tried it out. I didn't likeit for topo, so I returned it. Perhaps you might to try the same and see if it will work for you.