There's a different approach to cleaning and de-cluttering and author Hoffman is here to put things a lot more bluntly. As another entry in the housekeeping/how to clean up your mess entry, Hoffman writes how the reader can tackle cleaning and how to better use their time so it does not become such a big overwhelming task.
Perhaps as you can guess from the title, it's definitely as a "genteel" as Kondo's approach of tidying up. There's profanity, there's acknowledgement that some people are just plain lazy, there's also text addressing how someone with physical limitation and/or mental illness can approach on how to clean. Hoffman also has tips for how to clean/declutter for a move, for when you have unexpected guests or when you live with someone who might not be as diligent about cleaning.
That's about it. As other reviews say, is there anything that's particularly revolutionary or trendy? Other than the language, probably not. I was pleasantly surprised to see she did have information on how someone who might not be able to clean for whatever reason (physical/emotional/mental, etc.) can manage. I also liked that she talked a bit about how everyone cleans (or should clean) regardless of gender. It was also nice to get some validation for my personal experiences of how I tend to tackle cleaning: marathon sessions that leave me exhausted and only last for a short time anyway, which isn't particularly effective.
So while this isn't an approach for everyone and it may be repetitive, I liked it a lot. I hate cleaning and tend to leave clutter or only clean the more serious messes like dishes with food or when something is going actively smell, etc. I've never really understood friends who would obsessively clean (to be fair to my friends there were likely personal issues involved) and just can't be bothered. Will this change me overnight? No, but as someone who's never read a housekeeping magazine and just doesn't care for these things this book was a good fit for me, even if not everything she talked about applied directly.
It's not for everyone so you may want to skim through at the bookstore and/or library or check out her blog (which I had not been aware of prior to reading the book) before to see if it's a good fit for you or someone else. I'm sure some people will faint at the very title of this so you may have to gauge your audience before deciding to purchase.