I rated this two stars in the true "it was okay" sense of the rating. The idea behind this is kind of fantastic and unique (to me, anyway), but playing out the murder mystery is where everything fell flat. Too much had to be told in scenes reminiscent of every cop show where the tech geek spells everything out (especially needed here because the tech is made up and thus needs the exposition) so the audience can follow.

Usually something like this could be saved by great characters, but there were none here. Everyone is cut from the same murder mystery cloth.

...This is a lot more than I anticipated writing on the mobile app.

I've enjoyed other Scalzi novels a lot more than Lock In. The idea is great, but the execution, not so much.