This is one of those movies that feels like it has to have a twist ending for no real purpose. The twist certainly doesn't enhance the rest of the movie. In fact, it has nothing to do with it.
I can't say what I didn't like without revealing the twist, so you've been warned: The twist is that the guy was actually the dead one the whole time. The whole movie and all the robot stuff presumably just happens inside his own imagination. He only has two calls with his 'dead' wife in the movie, one at the beginning, the other at the end, and both calls are basically just them saying I love you I miss you to each other with nothing of importance being exchanged. Then after the final call, when he probably thinks she'll shut down, he does instead.
So... ??? I don't know what else to say other than the movie has no point. He doesn't learn or grow at all during the movie, but even if he did, he just ceases to exist at the end. There's no commentary on the afterlife or life and death. And he also has no impact on the real world. Literally the only shot of the real world at the end of the movie is the woman walking away and an employee says 'sorry for your loss'.
Furthermore, the characters have horrible personalities and no growth. The main character isn't particularly likable - he spends most of the time being dismissive and grouchy to his robots to the point that one commits suicide. And the woman's characterization I guess is that she's a woman. She can speak French. Something something babies.
Finally, even though this movie isn't technically a commentary on robots, AI, or the consciousness inside them since it all happens in this guys mind, I also find it tiring that all these movies like Ex Machina, Her, and Zoe are always like, here's a man with/making a robot female! Why's it always gotta be the woman who is the robot being made by the smart scientist man? It's not that big of a complaint, it's just kind of annoying.
My conclusion is, the movie is slow to the point of boring, and nothing that happens matters. There's no lesson, moral, or growth. So... I'm giving this a 1 star. Thanks and as the wife's last words to her husband are: 'bye-bye'.