If you’re looking for a good time sink game, this is the game for you. The value is much higher than anything you’ll get from playing most other games solo, especially if you’re a Zelda fan.
Great style, refreshing gameplay, and lots of small, frequent updates, even if Nintendo's still squashing communication and hasn't learned everything about options and standard practices that make other online games successful.
[F]or those who like dungeon/raid feels, Monster Hunter 4 Ultimate should scratch that itch for you. No, it's not an MMO, but it's a strong example of what MMOs that want to focus on that aspect should be doing. Being on the 3DS means the game also can function as a mobile MMO-like game; it worked well on a connection from my phone after I went over my data limit while I was in Japan, which was quite impressive. There are hours of content to explore, either alone or in groups.