I don't like to "DNF" any book, but I came close to it a few times reading this one. It felt like I read the same book 3 times during this trilogy.
The plot had potential in the first book, but it did not go anywhere. The same conversations are had in each book. There is constant planning, but nothing really happens. There's very long descriptions of physics from each character's POV, so you're basically reading the same thing over and over again.