I was actually looking forward to this one, but in the end, got quite disappointed.
The story is made in a way that while it's super simple, it is presented in a way you cannot understand what is even supposed to be going on up until the very end. Probably intentional, but for a slow film like this, nobody is going to try to sit through those flashes to understand it.
The main character is unlikable and boring, there is no comprehensive dialogue since every character in this is confused just as you are. The ending achieves nothing, since the next time his mother is going to get sick again he will parallel-travel again, so it's not like we've moved somewhere. The whole quest for Cindy is understandable only to the main character, so the viewer won't get why she is so important up until the end.
There's also a couple of pseudo-philosophical monologues, some of which are okay in their core, but those ultimately don't even fit into this mess of a story.
It's just too much unfocused stuff, they really should've worked on the presentation. There's like dimensional travel, an overprotective mother as a device to control the travel, choices, possibilities, Kevin Costner dull-faces, and possible viewer death by epilepsy (through excessive flashes).
