I'm not entirely sure how to feel about this novel. I enjoyed parts of it, and the concept was very promising, but there was something missing from the execution. While I didn't mind that the focus was incredibly domestic for a time travel novel, I do think that there were too many scenes of a pointless nature. The story could have been told without so many pages wasted on unmoving text. Usually novels that jump around in time are fast-paced and exciting, and I would doubly expect that from a novel that is jumping around due to a time travel aspect, but alas, it was not so. It was like slogging through molasses in too many parts, and a novel with this premise should not, in my opinion, be slow-moving. The worst part about this is that things that the author should have spent time addressing got tossed aside and forgotten. 
 Character development was nearly nonexistent, and, in her attempts at it, Niffenegger does the literary equivalent of using a chainsaw where a scalpel is needed. Henry's domestication is about the only permanent (i.e., not short-term and due to grief) change of character in the entire book. None of the characters really alter from the moment you are introduced to them until the end of the novel. Because of this, all the characters ring hollow. 
 Without including spoilers, it's difficult for me to go into this, but the relationship between Henry and Clare really bothered me. Henry shaped who she was, and his influence set him aside in her mind as The Only Man For Her. If it was intended to be viewed as troublesome, then I would have no problem with it, but it isn't -- the author clearly intends you to see their relationship as beautiful, pure love. 
 None of which is to say I entirely hated the book, but it was definitely disappointing as far as depth and plot development goes.