I'm not a big fan of military sci-fi. The whole "follow orders without thinking" mentality just does not click with me. Nonetheless, this was a good read. Author is an ex military, and you can tell after just one page. The main character is likeable and well described (not so for all other characters, alas). Plot is gripping and well paced. Ending felt a little abrupt, but on second though it has everything needed to wrap everything up nicely.
My main criticism to this novel is that, while it has a great depiction of military life/people, well it has little else to offer. Basically all characters are military, every location visited is a military base/station. Very little worldbuilding is done outside of war-related stuff. There's definitely room for improvement here in the next novels.