Carnival Phantasm - THE GREATEST THING EVER CREATED BY THE HUMAN RACE
Story- This don't need no story, its basically a whole bunch of comedic skits, so the presence of story is neither needed nor wanted
Art - It is an ONA so art isn't really gonna be that good considering the budget ONA's get, but the use of simplistic art favors the humor, in fact it wouldn't have been as good if the art was high budget.
Sound - Best Opening ever made, in all of creation.
Characters - All the Type Moon Characters, made brilliantly hilarious. Best Type Moon Fan service ever
Enjoyment - This represents that maximum amount of enjoyment a human being can ever have.
Overall - You need to have watched and be familiar with the other Type Moon Anime: Fate, Tsukihime. But if you liked those.... this will be a better present then anything anyone has given you...... Even a car.
If you haven't watched it, and you've seen other type moon anime, watch it now. It is pretty much the best comedy you can get.