If you like this person's taste, follow him or her!
See it if You have kids that loved the movie
Don't see it if You are expecting an exact duplicate of the movie or if you expect prefect execution - the cast is tired
See it if You love the music not only of Carole King, but if the 60s and 70s in general.
Don't see it if You are not in 60s/70s popular music
See it if If you are a fan of the books
Don't see it if You want a kid free experience or if you have no imagination