Saw it last night with a bunch of hiking/climbing pals... Delightful movie, everyone in our group liked it. Yep, lots of flaws; Redford's acting was kinda poor, but made up by Nolte's acting/character. The bear scene was ridiculous. Their hiking itinerary was silly (compared to book), but all together it worked very well. Yep, the hiking poles strapped to their packs even crossing the stream???? But who cares, fantastic little flick.
Lots of folks (on here) keep saying it deviates form the book so much, but the little comedy bits are all verbatim. I just finished re-reading AWITW yesterday before going to see the movie, so it was all very fresh.
All of our pals with us have now expressed interest in hiking the AT, whereas before they had only barely even known what it was (we are all westerners). so yeah, this has to have an impact on near-term trail use. I made the point of how excellent an idea it is to do some variation of a flip/flop to avoid crowds, folks all liked that idea.