No, I've never found anything I particularly wanted to hear. For me, it's always been outclassed by the festival in Wigan, also in Greater Manchester. However, my tastes are primarily for the sort of jazz recorded between 1945 and 1965, which means Wigan's repertoire has been just right for me. Over the years I've seen Mel Lewis, Frank Foster, Phil Woods, Claudio Roditi, Bill Holman, Scott Hamilton, Peter King, Alan Barnes, etc, etc, but the festival is now sadly reduced to a four day event because of public spending cuts:
http://www.wiganjazzclub.co.uk/WIJF.htm