If you are riding in the woods alone...sounds like the SPOT is perfect ..but for your safety ie NO cell phone in many wooded areas. I like the tracking to update folks on your progress. Also good to have if you are unable to push SOS etc as at least they will have last tracking spot.
SPOTs are frankly not good for an accurate track picture as you only get a location every ten minutes. This is especially true if you are exploring and making short legs. Most any GPS will give you track locations frequently along your route to better show where you actually went for the whole trip.