Average game, lots of hype
I'll have to say that the previous reviewer is correct - while this game is okay, it isn't the revolutionary game that some many non-gaming (or semi-gaming) sites say it is. The two-tier game is kind of jarring, and the microphone is wonky.
Now, the art is fantastic for a game like this, and the tamagotchi-esque play is pretty interesting, so I'll give it a 4.
If you don't understand Japanese, get a translation guide, and to be honest, you should really look at the Tokimeki Memorial games for a not-as-pretty, but much better 'game' game.