I have had the Colorado for months now and use it mainly for Geocaching as well as two other Garmin units, the Fortrex and eTrex (we have a large family) and can honestly say it just fantastic. You can upload directly from the Geocaching web site into the Colorado all the information regarding the Geocache points. I use both Memory Map and Garmin TOPO to sort the route out before we set off and download the days walk back into the computer. We can then review the walks on both programs and upload into Google Earth, brilliant. The only down side is battery life as you can only get and good days outing on one set of batteries but then as we use rechargeable AA we just swap them out and replace them if need be. You can now use Garmin TOPO using Macs so its a good all-round solution.
(Written by: ukpooka)