The ICC's showpiece initiative has been criticised in many quarters, looked upon as a damp squib, and Harmison appears to be no dissenter on that score.
"I wouldn't say I didn't enjoy Australia. But if I was perfectly honest the cricket was not that great. That was the disappointing thing," he said, having arrived in Lahore with his fellow Super Series star Andrew Flintoff to rejoin the remainder of England's Ashes heroes as they prepare for a three-Test series against Pakistan.
Harmison was satisfied with his own bowling in Australia but did not feel at home playing in an all-star XI in which few team members knew one another well.
"It very quickly made me realise what it meant to play for England. It did not even feel the same as playing for Durham. Something just wasn't quite there, wasn't quite right."
Unfamiliarity with his team-mates was a particular problem for a cricketer who has become used to the spirit of togetherness England have deliberately fostered under captain Michael Vaughan and coach Duncan Fletcher.
"I was playing with a group of blokes I didn't really know," he said.
"I didn't know any of them inside out, and it did not feel anything like the same in the dressing room as it is playing for England or for Durham."