One of the most enjoyable aspects of O Briain's delivery is his skill at interweaving pre-planned material with spontaneous flights of imagination The Herald

O’Briain is now recognised as one of the finest stand-ups on the circuit. His prodigious ability to think on his feet, garrulous style and all-encompassing taste in subject-matter have earned him a broad church of admirers The Telegraph

Unassuming, likeable and very, very funny Time Out

Top stuff. If you haven't heard of him yet - you soon will The List

Very, very good. I refuse to believe that he is destined for anything other than major stardom. O Briain is just too classy for words. The Stage

A big man with a warm, engaging personality and a quick wit, he spirits up laughs like a magician pulling rabbits out of a hat. O Briain makes it all look so effortless. The Scotsman