Got the Rino 120 myself.

The lack of some features on the 120, such as the color screen and internal compass really do make a difference if you don't use a compass regularly. I use the 120 in one hand and the compass in the other. You have to, especially in the tree's. The 130 has the internal compass.
Just remember that the compass has to be calibrated.

We all went to the Rino units in our camp, for the 'low-jack' feature, if nothing else.
After one of our members got a bit mixed up, okay bloody lost and darned nearly dead, we pretty much have come to require them.

For gaining assistance in retrieving game, keeping track of other hunters in your party and all around tracking and route keeping it's nothing short of
phenomenal.
We trade routes, plots and locations every night to help plan the next hunt and avoid really bad areas in the future.

If you get the standard battery pack model, or the adapter, use the expensive Energizer high drain batteries, $9.00 per 4, but you'll get a couple days out of them unlike standard Energizer/Duracells that won't last a full day of heavy use.

The new upgraded batteries and such on the 530 model are very nice! They have a new 530 model that's replacing the older 530's that were giving so many problems with seizing up. Way out of my price league but very nice.

Did I say, we require them? For us, they are that important.