Normally I wouldn't support an over-hyped, Oprah endorsed book-turned-movie, but I say just go see it. Julia Roberts is surprisingly tolerable as Liz Gilbert and she only throws down her signature laugh a few times (but appropriately). My only complaint would be that it's a titch on the long side. Overall I felt really inspired leaving the theatre and like I'd just come back from a vacation (like you want to change the way you live). It kinda made me want to read the book.
You all know the story so grab your mom and check it out (I know you want to!).
You'll thank me later.