If you consider yourself a movie critic savant, go buy your tickets, eat your popcorn and stick to the big screen. Those big money making movie producers/director/actors eagerly want your reviews!
For people who know how to enjoy different genres and can enjoy low-budget films, then watch it. So in a nutshell is it big screen material? No. Horror? Not really. Predictable? Yes. Low-budget? Definitely and very obvious.
Acting was decent, even Mamoa. You can't put Mamoa in a movie and not have him physically kicking ass, even as an AI! Is it worth watching just because Mamoa stars in it? Meh.... Is it worth watching because David Hewlett's name is stamped on it? Yes!
Does it leave you feeling euphoric? No. Would I watch it again? Yes.
So I recommend you watch it, on a lazy day while multi-tasking on a laptop/iPad. Keep in mind that if you are expecting a mind-blowing out of the ordinary movie, don't bother watching. IT IS A LOW-budget movie. The Sci-Fi channel has put some seriously bad movies out there, so compare to those, Debug falls in that realm of a decent Sci-Fi watchable.