It's based on a true story, and I like it very much, especially the air combats scenes, they're amazing! Although the story is quite sad, but it's really worth watching. Just sharing with you guys..
Never heard about Flyboys before, but it seems you have liked this movie. I looked Flyboys in imdb, Flyboys has a rating 6.5 out of 10 in imdb.
The user review in imdb say also it's a good movie to watch, I think I will watch this movie ..