I found the info dumps and complicated descriptions about the time travel boring and it took away from an otherwise good storyline. I never really understood how two people from 100 years in the past could drive modern cars and in general know everything about the new technology. At one point he used a computer scanner. 
 In addition, the parts where Jessie couldn't remember what had already been described were confusing since they were before it was explained. I thought it was needlessly confusing and could have been written in a different way.