No, I'm going to "use it as a GPS" per se. I mostly navigate by terrain association or map and compass. But if I do want to verify my position once in a blue moon it might be handy. I always want a camera, and if it can be a backup GPS too, well, that's one less thing to carry. Plus I'm more likely to actually bring it, so I'll have it if I need it. (I usually just leave the GPS at home.)
But, nice- the TS4 seems to be what I'm looking for. And it is water- and dust-proof to boot.