I've got no regrets with my RS investment in one TH. I just haven't used it much (yet). I do plan to give it a try in a trip coming up soon where there a lots of live oak trees that overarch the narrow roads on the island.
That could be a good place to have it as GPS can get a little wonky when there are a lot of overhanging trees. Had some of that with the Breeze in Florida this past winter. 16+ satellites and solid positioning outside the canopy, but drifty under the canopy. Still had the satellites, but acted like using GPS indoors.