It's streaming on Netflix now. I enjoyed it for what it was, although in reading some reviews it appears that the movie strays pretty far from Neil McCormick's book, which I haven't read.
At times the guy who plays Bono looks and acts nothing like him, but on a few rare occasions he actually hits the mark.
The other members of U2 only making a fleeting appearance at the beginning of the film. But there is lots of U2 lore and Dublin landmarks sprinkled throughout the movie. I like the way the movie marks the passage of time by which U2 album cover is plastering the walls, streets, billboards, etc.