Yea I pretty much agree with Paul completely on this one. I do enjoy the film, very much of it (mainly scenery, most the songs, and Julie Andrews), but I definitely do not think it's good at all.
That lack of compellingness @grudlian. mentioned is basically true for everything in it: beyond the Nazi escape, the romance isn't compelling, nor is the kids' music career, nor Maria's arc. What else is there then? Beats me.