I use it in Oregon and Washington on my 60csx. I have been using it for 5 or 6 years and like it. I think now you can get the data on disk and download maps and trakcks back and forth between the computer and card? I just have the card as that all that was availble whn i purchased, and no regrets. I haven't used the huntinggps maps so I can't compare. I did upload maps from gpsfiledepot.com for Idaho last year and they were fine for topo. What is really nice about the Garmin card is it also has turn by turn directions for both city and forest service type roads. You can punch in a destination say hog flat, and it will give you turn by turn road directions, something I was unable to get with the free maps from gpsfiledepot.
It does pretty good on water sources, used it to find a stream/spring to figure out where to camp last year in the minam. Its also very detailed on topo, to find benches, etc.