So, the 5th episode of the serie's ninth season is in my opinion the least entertaining episode on this season yet.
The episode begins with the usual irrelevant scenario, Peter's birthday. The story then quickly evolves into a story of Lois' way into boxing. The episode, in the beginning atleast, was very predictable. Lois convinces Peter that her first fight was a rush of the moment type of thing, but it became rather obvious that she would be boxing throughout the episode.
The episode gets a twisting turn in the midpoint, as Lois is challenged by the champion of the town. Then it became obvious that the episode would have a big epic fight as it's big finale. And this was the case. But then again, as the fight is fought between one of the main characters of the show and a character never before seen in the show, it was very clear who would win.
But then again, I enjoyed the last fight, I always find well animated fighting entertaining :) There were a lot of basic Family Guy humor throughout the episode, but then again, you can't build a good episodes out of good jokes and a bad storyline.
In conclusion, this episode most definately wasn't a disappointment, but it could've been easily better. The storyline went nowhere and the "Peter's own milk" joke in the end was pretty much the icing on the top of this heap of mediocre entertainment.