I have a 200 model that I got free from a Discover Card promotion last summer. I use it mostly to reach a site and then use my handheld Lowrance. However, if I have to hike in to one or more caches, I love to take the Nuvi along for the paperless feature. I'll put it in a ziplock bag in the off mode (to keep it dry cuz it's not waterproof) and stick it in my backpack. When I need it, I turn it on for a short duration (cuz of the short battery life). Love it...don't know how I existed without it.
By the way, the Nuvi does have a pedestrian mode...don't know how well it works though.