Too long, too inconsistent, dialog too vague

Rating: 3/10 (4 October 2015)

I really wanted to like this movie. After seeing it, I came away thinking, "It could have been great."
But alas, there are just too many basic things wrong with it.
1. It is somewhat too long for the amount of story. At nearly 3 hours, there are simply too many sections of it that drag on without enough progress in the story. Cutting about 1/2 hour out would have picked up the pace and made it much better
2. Too many scientific inconsistencies. They take off from Earth in a conventional rocket with separating stages needed to escape Earth's gravity, yet there are scenes when they miraculously jet away from massive planets many times Earth's size (with gravity at least comparable to Earth's) in smaller portable vessels.
The worst example of this is the reveal that the father actually sent the "Stay" message back through time to his daughter, completely overlooking the age-old time paradox that if someone from the future were to communicate to the past and were to alter it in any way, it would change their very presence in the future.
3. Too many scenes rush through explanatory dialog quickly and with poor sound fidelity so that it's easy to miss key phrases or explanations. That happens often in the transmissions from home.
4. There's too much jumping around between parallel plots with rapid cut scenes so it makes the story awkward to follow. For example: When they lost touch with Romilly and then find him again, 23 years of his life have gone by. They had discussed the plan earlier, so that the viewer understood that time would slow down for the ones who left the ship. They return to the ship and he has aged. That's all good and consistent (although I pick a bone with the fact that he could have gone to sleep for much of that time and not aged as much... after all, they all knew that this would happen).
But later, in the scene where Mann has busted Coop's helmet and he's dying from the ammonia atmosphere, and Brand is madly flying to save him, we have this great action with him fighting on the planet with Mann, his helmet gets cracked, he calls Brand, she is flying to save him. Back and forth it goes... her flying, shouting, "faster faster faster!", Coop gasping for air, Mann walking off being the villain who can't even look at Coop as he is dying... and then...
we have scenes of Romilly figuring out that Mann's data, which he is extracting from the robot, isn't "right"...
... and then Brand saves Coop, and then the ship with Romilly in it blows up...
What the ???
Yes, you can figure it out, but it is very clumsy, and in fact, cutting back to Romilly tinkering with the robot while Brand is saving Coop just kills the tension and drama of that sequence. I kept feeling like cutting back to him was just plain getting in the way.
There's too much of this: little bits intercut while something else is going on. I know they are trying to portray the passing of events at different speeds and the action on simultaneous worlds, but this above-mentioned scene is just one example of places where they take this too far and do it unnecessarily.
4. Finally, they play fast and loose with important-sounding Einsteinian explanations of gravity, time, matter, and black holes, neatly explaining physical and universal phenomena that simply aren't true.