I really enjoyed Eat Your Heart Out. It has profound character growth and insight into how different people react in traumatic situations for the main group, and it's a really engaging read. Kelly DeVos has a wonderful skill for describe setting in a way that draws the reader into the story. I think the concept behind how the zombies are made and develop is really interesting and unique to this story. 
I'm not giving Eat Your Heart Out a 5 star review partially because of how it uses the classic horror tropes, though the usage and breaking of these tropes is also one of my favorite parts of the book. I didn't like that

one of Vivian's first thoughts after Allison's death was to kiss Steve

It's 100% a trope used in slasher fiction all other time, but it's one of my least favorite tropes. The body positivity aspects of this book were also really well done. There was a strong message that thin doesn't equal healthy or strong without making the book didactic.