Hitler was charismatic, but that was pretty much it to be honest. A lot of the 'great leader' aspects are complete fallacies, and for every positive (usually instigated by a member of the Democratic party, Schacht I think his name was) there were a series of negatives. i.e., increased work in construction went hand in hand with the deconstruction of the trade unions, the reworking of the education system to suit their social darwinist philosophies etc. The whole economic 'boom' that happened was based around getting Nazi Germany to go to war, a war which in the end destroyed the country. Without this war plan, the country wouldn't have been anywhere near as successful as some people claim it to be, and it's because of the war that the country failed. Not to mention the money lending, the theft of Jewish estates, etc. Nazi Germany wasn't anywhere near as strong as it's now implied it was - a lot of cracks were covered over by Hitler's nationalism and the inherrent racism in the system. And, you know, a brutal secret police force. This is without even getting into the genocides, discrimination, etc (which in my opinion completely rules him out of being a great leader).
So in short: the Nazis did a select few things right, and those few things could never have been sustainable long-term. How much Hitler had to do with them is questionable. He was charismatic and that covered up a lot of problems in the country, and with his leadership in general. And he was, obviously, one of history's greatest monsters.