Damn, this season really did end with a strong stretch, didn't it?
is a very good introduction to the Dominion proper. I love that we don't get the full story of what the Dominion is and how all the races play off each other here. That stuff won't come until later - in the case of Vorta, much later. This episode merely gives us our introduction to the Dominion, much like Q Who
gave us our introduction to the Borg only to have more information on them revealed later.
And Quark's little speech about Humans and Ferengis is definitely the high point of the episode for me. He glosses over many of his society's flaws, but he does make some damn good points.