I didn't mean to dismiss the whole thing just because of that ending. There were even aspects of the ending I liked, but the romance aspect doesn't hold up to scrutiny. The science doesn't either but that's not as problematic for me. My main problem with the "science" is how much the guy who "invented" source code didn't understand it. That's not a bad twist in and of itself, but again: If he had been paying as much attention as I was, he would have realized his concept of it was bullshit to begin with. It actually feels forced that he's only considering this incredibly narrow application of the technology and not asking questions that this semi-brain dead dude figures out in a matter of minutes.

I like that you're considering the whole "unreliable narrator" angle. I don't think that's the case here, but stories like this are fun because they're open to multiple interpretations.