As a fan of both Paul McGann and Richard Grant, I looked forward to the Criterion Collection "Withnail and I". But perhaps I'm too American to appreciate the humor found within this film, which I understand has quite a cult following.
The film is mostly a series of vignettes between the alcoholic, acerbic Withnail and the softer Marlowe. Withnail is the sort of person who is intelligent and talented enough to be anything he wanted to if he'd crawl out of a scotch bottle long enough. Marlowe is alternately exasperated by and in awe of Withnail. These are early roles for both McGann and Grant, and they show remarkable talent that would be exploited in later roles.
Though touted as a dark comedy, I found more "dark" than "comedy". There were long periods between laughs while watching this film (mostly mundane things like driving cars, watching them walk to town, and chase a farmer down to buy firewood) and it never quite felt that the film was actually building towards anything until Uncle Monty shows up to the cottage to put the moves on Marlowe. Watching McGann squirm his way out of this was definitely worth watching, but took too long to get to.
Not a horrid film, but one that generally left me with a feeling of, "What was the point of that again?"