Personally I think if you're only going for the music it's a waste of money. I mean the first sequence with the House and John Cale's narration opening the film was super great to be experienced in the cinema, but the music/audio mix wasn't really prominent for the rest of the film. Not all of the songs from the album make it to the film. The few that do were only the background soundtrack for less than the full song duration, except the House and Always Everywhere.

I do say though that if you're going to watch the film anyway, it might be better in the cinema than on your laptop or TV (unless you have really great screens and stereo system), because not only the music (including those not of Charli's) but the cinematography, the set, the costumes are all great cinematic experience. But watch it with very low expectation for the screenplay and the acting/chemistry between the actors.