Oh god, this is quite actively bad. Incredibly lazy screenplay and somehow Jarmusch doesn't make much out of it visually. I think those first three films are defined by how characters interact with their surroundings by trudging through them on foot and the taxi conceit sort of fucks up his whole ethos.
Particularly galling that it's more or less a downward spiral. LA isn't as funny as it thinks it is, New York is decent but should be the weak link in a far better film, Paris never made it past first draft, Rome is insufferable and Helsinki is just a damp squib of an end.