I loved the mystery and all the double- and quadruple-crossings, trying to figure out who to trust. I thought it worked great as a sci-fi/fantasy/mystery sort of story. As a romance? Not so much. Jake starts out with puppy love, they spend almost no time together for years, then Trace dies and Jake gets the Sim chip. Arguably he develops a relationship with the Sim over the next five years, but... I dunno, it just didn't quite work for me as a romance. But as a rolicking mystery romp set in the future? Hell yeah!