I've had my CO for a week. It's nice. Never had another GPS before, so don't have anything to compare with. I like the DEM maps. Screen is big, and graphics good. It also has profiles for different modes. I added an aviation mode that I use for flying, not too bad. Geocaching is fun with this model.
Street navigation is good, it also recalculates detours fast. Loaded Speed camera POI for South Africa, although there is no proximity warnings, the signs do show up on the map!! The screen is a bit dark indoors, and you need to use the backlighting, which can be a bit harsh on the batteries.
Got DC cable for car, so saves batteries, You have to have Firmware 2.51 for this to work though.
I am really happy with the GPS