In any set of games one of them has to be the worst. It doesn't mean it was a bad game. FFII had a lot of key elements in it that Kishi has pointed out, it helped set the tone for what would become the greatest game series ever.

As for the game itself, it wasn't great, but it wasn't terrible. I just can't get beyond the brutal level up system, if the game used actual experience then I think it would be a lot better. The storyline was pretty involved, and that was a pleasant surprise.