On paper, its highly practical and it all depends on engineering conditions in which you can make benign rulers.
But the nature of power is such that it is "beyond good and evil" and combines both. So a Communist morality cannot be intrinsically "good" as it must also do what is "necessary".
do I hear the march of jackboots?
Not to mention corruption and selfishness!
@Wu Wei - what would you say characterises "pure anarchism". Aside from disorganised loners who might fit more into individualist anarchism or just a general kind of narcissism, most people who describe themselves simply as 'anarchist' are basically anarcho-communists. They support the establishment or emergence of a stateless society in which the people run their own affairs, hold the means of production in common and conduct themselves in a society by direct democratic means.
If you successfully prove that communism and anarchism are incompatible, I can say I've been run out of the Communist DIR by bears