Had the 120 when they orginally came out. Currently have the 530 model that they don't make any more. The only reason I bought the 530 was that Walmart online had them at a smokin deal. All the people I hunt with use the Rhino and we all love them.
If you go to a new place and mark it as a waypoint your fellow Rhino users don't have to punch the cordinates in you can just send it to them. Or if you hunting with some one and you want to know where they are at all you have to do is poll their Rhino. The only problem to watch out for is if you are talking to your buddies and telling that you have a great spot or alot of for instance quail in a certain area any body else with a Rhino that is within radio range will know where it is to. When were all together we usually just turn off the GPS.
If you get one make sure you go to the Garmin website now and then to check for updates. I usually go at least once a year.