Is it bad that I found a book about murdering six people to be so hilarious?

I feel like Grace was the millennium-cool-girl-anti-hero we need right now, and hearing her commentary on modern life was a highlight on the book for me (and yes, I felt very called out at times). I know some reviewers thought she was mean but I feel that was kind of the point - you're not supposed to feel total affection for a serial killer and it shouldn't be a surprise that she can be a total bitch at times!

Finally the ending, I know some people were disappointed but I thought it was great - it rounded the book off in the perfect way for me.