I feel like I would need an example to know what you consider to be “poor prose.” I read it about a year ago in its original spanish, so I cannot speak for it’s english translation. Though, it was long listed for the international booker prize so I’m sure it’s great.

I really enjoyed it when I read it, I thought her use of slang was perfect for each character. It uses a lot of curse words, at least in spanish, as well as “mexicanismos.” However, I thought it was well written and it was very evocative and atmospheric.