Regarding Bin Laden, Bush deserves absolutely no credit. None. The Obama administration exhibited restraint and discipline that escaped the Bush White House. We'll never know, but if the Bush administration could have been as controlled as Obama's, they may have been able to catch Bin Laden years before.
That said, although I believe Bush will go down as one of the worst President's in history, he was very cooperative in the transition period to Obama.
"It does me no injury for my neighbour to say there are 20 gods or no god. It neither picks my pocket, nor breaks my leg."
-- Thomas Jefferson