I finally had the chance to run this for my party, and it was probably the most fun we've had with a single-shot session in a long time. It was an amazing ride from start to finish, especially if your play group is familiar with Chairman Kage's Iron Chef. (And, if so, be ready to pull out a yellow bell pepper and bite into it when you finally introduce Xang Su Ya.)
The only major suggestions that I have relates to the final food fight. While the ability to use Dexterity or Strength for the food items is definitely a good one, it leaves spellcasters high and dry. They're already running into a DC 18 Arcana check to cast any spell, and they can't even use a relevant ability score for the food items. If you want people to use the food items, they really ought to be more accessible to everyone.
In addition, we found that the damage being dished out by the enemies' food items, combined with the ineffectiveness of some party members, meant that the party was losing the war of attrition. I ended up having Can-Yan and Chaun-Sze start preparing and administering white-chocolate-dipped fortune cookies that restored 2d6 hit points when consumed in order to give the players a bit more of a fighting chance, and that was after already restricting the items available to the enemies.
Those minor adjustments aside, this module was probably one of the best purchases I have made thus far. There's a lot of room for improvisation--our tiefling actually ended up pulling off Diplomacy with the oni, as she had flavored her abyssal heritage as oni-related without knowing about that particular encounter and it seemed too good to pass up--and, even if you only stick to the script word-for-word, fun is practically written into every scene.