If you know what you think of any other Fritz Leiber book, Swords Against Wizardry (1968) will confirm your opinion. If you love or hate the Fafhrd and Gray Mouser tales, you'll equally well continue loving or hating them. Here are a handful more short stories collected into novel form.
Myself, I thought the stories overwrought for the fun stories that they told. At time, Leiber settles down into a smooth narrative, but more often than not sticks in so many extra words and paragraphs that you can skim over the story with little effort because the stories contain so little.
I'm not saying that there's nothing there, but at times, he sure does approximate that. Much like weak broth, the stories feel watered down with lumps of meat floating about, but as nice as that meat is, it's just not worth the broth.
If you are sensitive to sexism, these stories sure do have lots of it.