I love the story!
The movie is beautiful. It really seems to be made in the 1950's. The atmosphere is tense and full of secrets, as it must've been in the post war time. Even having all the odds against it, it's hard to control love, and it is well-shown in the movie. More than anything, it is a love story, deep and compelling.
A mature 14 years old can watch the movie. It is a must-see to any person who's part of the lgbt community, mainly girls who like girls. However, I do believe that the movie will be better appreciated by +16 years old.
Ps: the book is awesome. (The Price of Salt - Carol)