The dialogue is pretty weak. People do things that don't feel natural. Weirdly enough, the movie explains certain things pretty thoroughly and interestingly, such as the whole lazarus/rebirth process, while other plot points are just revealed abruptly and sloppily.
The acting doesn't help things either. Keanu is on autopilot here. The guy who plays his boss is hit-and-miss. But it's Alice Eve (She's Out of my League; Star Trek into Darkness) who has the worst performance. She acts like an animatronic. (And yes this is even before the cloning. It isn't a something-went-wrong-type situation.) She has two facial expressions: slightly happy and slightly worried. On the plus side, Silicon Valley's Ben Middleditch is the only one who manages to make all the dialogue work. My hat off to him.
It's sad that this movie was botched so badly because the actual general story could have worked. The concepts they explore here are fun and fascinating. A lot of thought did go into how they brought the family back.
To it's credit, the film does look really good. It has excellent color use and picturesque filming locations.
Overall, this is a bad film, but I wouldn't say it was downright painful. I didn't leave regretting having watched it. If you like making fun of bad movies, then you might want to check this out. Otherwise, I can't recommend this.