It's one thing to read Irvine Welsh's grim tale of 1980s Scotland - it's another to see it happen three feet away from you.
No cultural milestone this time around, but some memorable moments on ageing.
As T2 Trainspotting hits cinemas, a great deal has changed since the original.
Danny Boyle's pop heroin fable defined an era and made the careers of everyone involved. Here are a few reasons to be wary of the sequel - and a possible happy ending.