I'm not sure enough praise could be heaped on this.  It's neck to neck with Band On the Run (and probably a couple of inches ahead).  It's got a joi de vivre that's utterly disarming.  Couldn't be more genuine and stripped down.  Macca's finest hour tossed off like so much whimsy.  Not one filler track, yet none even seem to be taken seriously!!!  The genius of the man.