£28.99 originally (which was a good deal anyway)...use code 15WYS10-1 to get it for £24.64
IMDb currently have an overall score of 9/10, and Metacritic have scores of 77, 88 & 86 respectively for each season.
Never seen it myself, but I'm tempted :)
IMDb summary: A drama about one of New York's most prestigious ad agencies at the beginning of the 1960s, focusing on one of the firm's most mysterious but extremely talented ad executives, Donald Draper.
Price matched at Amazon 03/05/2011