I wanted to like this film, but overall it had too many problems in terms of dialogue-writing, editing, and especially pacing of the scenes.
The main character is portrayed by a number of different actors, which is meant to show his ageing process. However, the difference in appearance and mannerisms of the actors was too great and it didn't really work.
There were problems with sound and editing, especially in a scene in a hotel room in the middle of the film, where there were cuts in the film between almost every sentence uttered by the 2 characters. If it was done on purpose, it didn't work; if there were things that needed to be taken out, they should have just re-shot the whole scene! The dialogue and pacing of the scenes also needed a lot of tightening up. There were too many long shots of characters looking angsty and some of the dialogue was awkward and didn't feel believable.
As for the plot overall, it wasn't too bad and could have worked if it were portrayed better. They should have shortened some of the segments or added more visual interest, and cut some of the segments such as the extended scene in a gay nightclub which was boring and clichéd.