I loved this movie. Really, that's all that needs to be said. It is one of those films where you know there are flaws here and there, but it is so utterly engrossing and the tone is so perfect you forget that there are moments when there should have been more drama, but it was toned down for inexplicable reasons.
This is one of my shorter reviews, but really, there isn't much you can say except:
-Kate Hudson was mysteriously intoxicating. You believed every guy wanted her.
-Frances McDromand made you feel sorry for her despite some unnecessary strictness. And she was hilarious.
-If you find rock awesome (like I do), you'll appreciate this portrait of the genre, the bands and the fans, and what drives it all.
-The writing was often clever and involving, if a little on the lighter side (sometimes, not for the best).
So I recommend this film to fans of entertaining, breath-takingly sweet (but not over-the-top), unbelievably "cool" movies, and to fans of classic rock. There's nothing left to say except: have fun.