I agree with many others that have said it ticks all the boxes, theme intergration, rules, sound outs, gizmos, etc. The ring is one of the best mechanical "toys" in any game and is used in incredible ways. If not the best game, it will always be one of the best games ever produced.
Sometimes, the best game is the one you just got. It is for me many times, but that doesn't take away from the fact it simply is a great game.