This film wasn't realised in the UK (I think) so I had seen no trailers or promos for it. My mother simply brought home as a fun bit of fluff for a Saturday night, and that was pretty much what we got.
I was unable to work out whether the film was actually taking itself seriously, or whether it was a gigantic satire on the whole follow-your-dream/romantic comedy genre. At times it was really funny or enjoyably wacky - for instance, quite a few parts of the flight attendant training; Mike Myers's character, in general; the fight scene between Donna and Christina; but at other times it was sickly-sweet (nearly everything about following your dreams) or very, very sincere (Donna's relationship with Ted). So it was really hard to understand how you were meant to react.
Personally, I found the morals of the story cliched and irritating, and the Sally Weston character just another strong-mentor-person-thing; and Donna did come across as just a bit too smug/perfect at times. Also the plot was quite annoying, with characters fading out leaving you wondering what the point was of putting them in in the first place. I would have liked the movie better if it had been more focused on Donna's career and less on her romance, which was extremely predictable.
However, I'd recommend renting it if you're in the mood for something totally fluffy and silly; you like air hostesses in movies; you're a fan of Paltrow (who was very good) or Mike Myers; or you just want to see a movie that seems more than a little separated from reality...