I don't think Dominion is a good game. It's good if you maybe think cubing is good. And it can be a lot of fun!
But as a game? It's not good. If you have no idea what you are doing and are totally unfamiliar, you can even win pretty easily with some luck. But you won't understand why you won, or rather why others lost.
There are many, many games where everyone can read the rules together and be, more or less, on even footing. Dominion can sometimes be that way, but it can pretty easily be extremely opposite of that.
Interesting, this is a _feature_ of poker games like Texas Hold'em. If the losing players didn't go on convincing winning streaks, they'd stop playing. And those winning streaks can convince them they don't need to learn anything else about the game in order to be a winning player.