Somewhat dissappointed - Garmin Overlander GPS Navigator

I bought this unit for the obvious, a larger screen with higher resolution, and with a number of cool apps like, History (locate Museums on the road), camp sites, parking sites, etc. I also bought this unit with the anticipation of using my Garmin micro SD high resolution maps including Hunt View. I was disappointed. Although this unit has a micro SD card reader, and it recognizes the 24K maps in its map file, it won't display them. A long call to Garmin support confirmed my worst fear, Garmin high resolution micro SD maps are not compatible with the Overlander Unit. Although the price was steep for this unit, I will keep it for its other features, but now have to use it in conjunction with a hand held GPS to see Hunt View information.