Despite being a massive fan of most things Coogan, I can't help but feel that at 6 episodes, this concept is protracted past its natural life. As individual episodes, the show is full of great observations and nicely improvised comedy, however, by episode 3, the repeated impressions and similar themes become tiresome, and you find yourself switching off until the men cover something you haven't already heard. Discussing the speed at which Michael Caine speaks is hilarious the first time, but not the third and as "A Cock and Bull Story" worked brilliantly as a feature film, I'm not sure why this concept was considered to have more legs. A made-for-TV film would have been perfect.
Having said that, there is a enjoyable chemistry between the two men, and seeing as shows like The Inbetweeners are the current standard for male "banter", this comedy masterfully outclasses any British TV offerings, maybe with the exception of Peep Show. And of course, with Michael Winterbottom in charge, it looks beautiful, intimate and exceptionally natural.
Definitely worth buying, but expect about 90 minutes of great comedy across the 3 hours.