The premise of this book is wonderful. I love all things dark and twisted, and this book seemed right up my alley. The problem is the first 2/3 of the book. Never in my life have I read something so taxing. The first part is slow, with nothing happening and written in a way that made it such hard work to read. I felt more exhausted after reading the first part than I did when I worked a full 10 hour shift at work! It is very slow, the language doesn't flow well and it took so long to read a chapter that I had to put it down after each one. It took me 6 months to read this book, and I'm a fast reader. I read so many books while reading this one because I couldn't bear to read it!
The ending of this book was predictable and unbelievable, with solutions to the various plot twists that I just didn't care about. Every single one of the characters is unlikeable and I found myself not caring about what happened to a single one of them. The character development was poor, and Gillian Flynn is very much a "tell you instead of show you" author, which really ruins the world building aspect also. The ending seemed hurried and was so hilariously bad (almost like a hilarious stage show) that it completely got rid of the "thriller" aspect for me. At least the ending went quicker than the first 2/3 of this book!
Overall, I'm glad I read this. I can't say I'd ever want to read it again, but I'm glad I read it. I can put it down and say I never have to pick it up again.
1/5 stars, although I'd gladly give it 0 if I could.