Will You Like This Movie? It Depends...

Rating: 8/10 (7 May 2016)

First of all, I think you definitely have to be a fan of late 50's (early rock 'n' roll) music to enjoy this movie, as it's centered around the story of Frankie Valli of Frankie Valli and The Four Seasons. But if you're a fan of this era (e.g., you grew up listening to this music) you likely will also have high expectations - especially for the music.
The movie can roughly be divided into two major parts. The first part deals with the rise of Frankie Valli (and ultimately, The Four Seasons). I thought this first part moved rather slowly; there's a lot of "detail" (but not nearly as much detail as what actually took place in terms of members of the group, etc.). If I had to base my review only on the first part of the movie, I'd probably have given it a much lower rating (i.e., a '6').
By the second half of the movie, Frankie Valli and The Four Seasons have "made it" and are a big success. But as is often the case, trouble has been brewing all along, and the second half of the movie, which is much better, deals with the how the group handles the inevitable problems behind the scenes. The second half of the movie is very good, and resulted in my ultimate rating of an '8'.
As for the music, all the classic songs are there. But, if you're a fan of Frankie Valli and The Four Seasons, then like me, you may be disappointed in the "quality" of the music - John Lloyd Young's (Frankie Valli) voice isn't on par with the original (but then, whose is? ;-) and the group as a whole doesn't begin to match the sound of the "real thing". I do give the actors credit for re-performing the songs themselves (as opposed to lip-syncing the originals), but still, it's less- than-satisfying.
To be fair, in the end of the movie, they do use a few songs (as originally performed by Frankie Valli and The Four Seasons) as part of the soundtrack.
Once again, you probably need to be a fan of Frankie Valli and The Four Seasons to fully appreciate and enjoy this movie. And that also means you probably were a contemporary. The younger generation is probably not going to identify with this era, and hence will have less of an appreciation for the story.