If you like romance novels and don't read this book you are only hurting yourself. Though if you read it, it will also hurt. Because drama. But still, you should read it. 
 I enjoyed the way the characters are depicted and their personalities. They are somehow very human and faulty, in a way that makes you relate to the mistakes they made. I think it made me realise how tainted characters generally are in books. It is nice to feel that kind of humanity in the characters of a book that make you like or dislike the person in a way that you would not normally feel for a fictional character, and I think that being able to accomplish this is quite an achievement. 
 This is an extraordinary love story that, to me, depicts what true sacrifices for love are about. I think that it is very interesting to read this story - published less than ten years ago - in a time where the trends are degrading the romance genre so much (yes, I am thinking about Twilight and Fifty shades of Grey). 
 I have really liked this book, the way it is written, the portrayal of the characters and also the pop-culture references that made me feel more connected to the story at a personal level. I have read in some of the other reviews that it is distracting or only trying to make the characters look modern, hipster and badass. I find this point of view quite surprising because, in the end, it is just the world we live in, right? It just makes sense for certain things to be mentioned. Also, I like books deviating a little bit from whatever genre it has been assigned to them, and having music bands, poems, artists, different languages and many other things pop up in the story makes it more "real" to me. 
 On the bad side, I would have liked that you could actually tell apart from Henry's and Clare's writing. They are two quite different people, and even though you can see some difference when she is young in the register she uses, once they are both adults I had to check the names (where it says who you are reading) more than once. 
 Finally, the sci-fi aspect of the story is also worth mentioning. The presentation of time travelling as a disease is a concept that I have never thought about before and it seems to perfectly fit the purpose of the story and it takes away the desirable aspect of time travelling that we find in other sci-fi stories. Niffenegger presents time in a very different way with this approach: we futilely try to enjoy the present while being obsessed with both the past and the future. In a sense, we all time travel in the same way that Henry does, we keep on going back to relevant events of our past - precisely, what we see Clare going through in the end of the book - and try to organise our lives according to what we think is going to happen in the future. I have found that this is a very, both sad and beautiful depiction of the sufferings of our lives and our inevitable future. 
 In the end, "time is nothing."