The novel's structure, with alternating chapters in different timelines of the main character's life, one progressing forward and the other backward from the start, didn't work for me. It constantly pulled me out of the story as I had to figure out where the plot was headed. Even with the chapter titles clearly labeled, I still felt confused too often. When a book splits like this, I usually prefer one plotline over the other. I was more comfortable reading the forward-moving plot, but I was more engaged with the character in the regressing plotline.
I didn't really care for the ending, but it didn't ruin the rest of the book for me. If you like military sci-fi with less emphasis on glorifying war, this book is a good choice. The author explains battle tactics and strategy with just the right amount of detail for easy visualization.
Even though this is only the third book I've read in the series, I would recommend reading at least the first two before this one, and perhaps even skipping this one until you've read more.