The third Harry Potter film stands up pretty well as good film. The first two are great if your idea of "adaptation" is "audiobook with pictures", but as film they're duds. The fourth was better than the first two, but more a Potter-fanboy film than a film-geek film.

I haven't seen the fifth yet, because I want to go with my wife and she's in Norway. We have gone to some movies "together" by seeing them on the same day and comparing impressions by phone later. We're not doing that this time because it's out in Imax, but the Oslo Imax theater doesn't have it. Since we want to see it in Imax and the Seattle Imax has it for eight weeks, we can wait until she's home.