New user warning!
After reading the forums and whatnot, I still went out and bought a Rino 110 today. Buddy of mine also bought one at the same time, different registers, same store.
Our one-day test:
Quite pleased with the location geometry with 1 (*ONE*, read: O-N-E) unit within 15 feet of the other. Closer than that and the other won't get more than one satillite to save the other's life. Once I turned off, we actually got within about 4 feet of published coordinates of a geocache, without WAAS. Pretty good, I think.
Radio coverage was actually decent. We tested this using my house as a waypoint. The hard part was that I have a rather large power substation about 1/2 mile as the crow flies from my house, which my buddy had to drive past. Even with that, we did a dead-reckoning (we both have nextel as well) of about a total of 3/4 to 1+ mile of reception. This is over a *generally* flat terrain, with powerstation inbetween.
Overall, quite pleased with the unit, except for my outstanding quesiton of "Yes, I'm here. Yes, I know where I've been. Please allow me to put in where I WANT to be!"
Dazzit.