I liked it. I also find U2's early "socially relevant" music about the dangerous times of 1970s dublin (what sunday bloody sunday is about) very interesting, and in some strange way I regret being a white kid who's never faced any REAL hardship, because there's nothing romantic to write about!
I like all that stuff but, in my mind, that's a whole different film. This one is about these three guys and that was a bit much of a tangent for my taste.