An alright sequel.
It's a more watered down story regarding Ming-Na Wen's character, with more focus put on lovey-dovey stuff as opposed to a fight of some kind. Therefore, things are naturally less enjoyable than in the original film. To me, everything's just a little slow and predictable so I can't rate it higher.
Away from Wen, the supporting cast is weaker with the absence of Eddie Murphy as Mushu. Mark Moseley actually comes in with an OK performance, yet it's not a jot on Murphy's. There are some notable newcomers though, with Lucy Liu (Mei) and Sandra Oh (Ting-Ting) appearing.
The music is average, as is the animation. It's simply a weaker production all in all, as you would probably predict. 'Mulan II' is, at least, still better than a number of other Disney animated sequels; e.g. 'Cinderella II: Dreams Come True' or 'Belle’s Magical World', among others.