The entire single player mission will take only seven hours. If there is an outstanding flaw in this title it would be it's replay value. Minor complaints for Dragon Sword will probably be around the control scheme. However, it's not hard to see what the developers were trying to do here. Instead of the repetitive button tapping experience on a console you get the feverish slash and tap of the stylus; some will love it and others will get tired of it quickly.
Overall, it's hard to find fault in this game as Dragon Sword does allot of things well and will hopefully show other developers the right way to bring their franchises onto the DS.