Herman Yau takes on the All's Well, Ends Well series. It's no doubt one of Hong Kong's most obtuse comedy franchises, and you need a manual (or a lot of cultural baggage) to make heads or tails of these films. There's also no good way to get acquainted with them, except tackle them head-on. Some familiarity with Hong Kong comedy is definitely appreciated though.
There is a semblance of a plot here, but there is no reason to care too much about it. The plot is merely an excuse to introduce a slew of cameos and have some sketch-like fun. The story about a princess sent out to learn the tricks of the trade is completely inconsequential, so I'm not even going to bother with it any further.
There are many notable cameos, the comedy is cheesy but varied, the effects aren't all that bad and the pacing is positively zany. Yau struggles a little with the project's commercial scope and relies a bit too heavily on his B-film past, but if you're looking for quality film making you won't find it here anyway. Silly but solid fun, like most of these films.