Basic TLDR: I really enjoyed reading this. It pays off to have read previous volumes, but doesn't feel necessary in order to enjoy this one. I would certainly recommend this to a friend to read if they were looking for something.
Longer More Specific Review: The idea by this point is pretty simple. You somewhat understand each character to at this point if you have read the previous 3 volumes. I honestly thought the last volume was really good for building the characters, seeming somewhat believable (in the contents of the world/environment that the characters are in), and made me laugh a lot and kept me reading. I continuously have been checking out these manga as something fun to do on the side while I am busy with other projects, but find myself glued to them and reading them within a matter of a few days due to me being so interested in what will happen to our characters. I genuinely find myself concerned for the characters and curious about what will happen in the story I am reading. This volume is no exception.
The best chapters for this one in my opinion are 32, 34, and 40. However, I honestly enjoyed all of the chapters in this volume. There is one chapter that in my opinion stretches a bit in terms of "reality." But I feel the set up to it make it more believable and nothing extreme enough happens, but rather just a bit of a stretch. The other chapters are also all spot on. The characters do a good job at interacting with each other and challenging each other while still acting within the frame that their character should behave.
All this said, I could see some not enjoying this series. The characters can seem a bit much, or irritating, or I also have seen some complain about the art style (although this is my first manga series so I cannot truly judge it fairly). I do personally think the art style could be slightly improved in a few scenes, but overall it is pretty good and compliments the comedy. I would say if you enjoyed the first or second volume, you will definitely like this one. If you thought the first or second were okay, give the third and fourth a try and see how you feel. If you didn't really like volume 1 or 2, I doubt you will enjoy volumes 3 and 4. But you never know. Overall, I am really enjoying this series and look forward to the next volume.
Honestly, I may need to change my rating system at this rate or my recommended list will become overloaded with manga from this series.
(Current System:
5 Stars -> Would recommend the book/or read it again in my own time.
4 Stars -> Enjoyed it, but probably would only recommend it to someone specifically interested in the genre.
3 Stars -> Liked it, but would not recommend it to someone.
2 Stars -> Read it, but did not really enjoy it.
1 Stars -> Hated it.