I've been impressed by AppCleaner's ability to isolate and eliminate an app and most if not all its associated bits and pieces which one might not otherwise be able to isolate. On a couple of occasions there have been several residual items which a careful search can isolate and one can deal with them on an individual basis.
AppCleaner is excellent but, in the name of protecting itself from malware, MacKeeper intentionally hides or disguises some components and others are a hodge podge of bits parts and pieces of other apps so conventional app removal techniques, even installation tracking daemons, are know to fail.
