The Celtics aren't that good if you are talking about great athletes. However they have very good basketball players and have an incredibly deep bench of "role" players that can do a couple of things very well. Big Baby,Powe,Posey,House,PJ, T. Allen and even Sam Cassell can fill a role depending upon the matchup on a given night. Very few teams have that many varied pieces. Other than missing a very tall backup center to guard the supertall freaks, they have nearly any matchup covered to play good "D". Having an extremely flexible team is a major strength that is being overlooked. Think of the different lineups the Celtics have had this year that have played well against specific matchups. (remember Baby doing so well against Duncan as an example or House lighting it up at times early in the year or Power dominanting now and then).The point is there really isn't anyone that the Celtics can't match and that in itself makes the Celtics a very good team.