Mixed feelings about the film
The first 40 minutes of the film was tediously boring, I almost stopped watching - but glad I stuck with it. Most of the rest of the movie was quite charming, and even with a predictable ending, I was glad to see the two main characters finally end up together (as well as their parents!)
As for the age difference, I didn't notice it too much. They looked around the same age and the girl from the Wonder Years looks young.
So definitely mixed feelings about the film - the first 40 minutes especially was way too long and it didn't really pick up until Sam brought home another girlfriend - but overall pretty good. I'd watch again next year.