This is my favorite Disney Pixar movie, even beating Monster's Inc!
There wasn't a minute where I wasn't enjoying the movie, there's very powerful meaning to this movie (that will go over kids' heads) and for once, it (in my opinion) tackles an issue big with teens and adults more than kids (at least more than usually).
The movie's message is (from what I understood it anyway) about anxiety, sadness, and fear of how you choose your life path. Even going as far as showing how you're so-called purpose in life may not even be correct (or real to begin with).
This is by the creators of Inside Out, which gave really good messages across about feelings. It was more kid-oriented, so Soul (in my opinion) being more about teens or adults was a surprise that I did not expect. I'm not saying this isn't a kids movie, I'm saying you shouldn't avoid it if you're not a kid.
It probably helps this movie that it's got it's messages across with Music as an instrument (get it?), as I too love music heavily including all kinds of genres (seriously, if you saw my YouTube music history you would think I'm somewhere between a 5-year-old girl, to a 101-year-old Beatles fan).
I seriously recommend giving this one a watch.