Sorry Mate,
Don't have one, but I have seen them in use. Hope you got a set of two not just a single unit. Two of them are just soooo much fun. Certainly a major leap from the Radio Shack walkie talkies of my youth.
A couple of observations I've made are that while the GMRS frequencies offer a much greater range than the FRS freqs (the Rhine 130 has both FRS and GMRS freqs) I would not use the GMRS frequencies unless your FRS reception is poor. FRS freqs use less power than GMRS freqs (FRS .5 Watt and GMRS 1.0 Watt for the Rhino). Sticking with FRS longer will lengthen your battery life.
Sad note is that while the 130 has 8 GMRS radio freqs which are for repeater use, the repeaters have not been authorized in Canada yet - to my knowledge. A good website on the GMRS story in Canada that is worth a read is at:
http://www.cnp-wireless.com/ArticleArchive/Wireless%20Telecom/2005Q2WT%20GMRS.html
If you have two you can plot the other radio's location on your Rhino (and vice versa). Kind of fun for a family trip involving more than one car, or for hiking in the woods.
It has a digital compass feature, which might come in handy, but based on personal experience with digital compasses (I've had one on my Magellan in Bosnia/Haiti/Afghan) I never like the thing for shooting bearings, I always bring a good old "analogue" compass
Hope this helps, and enjoy your new tool/toy.