A good military SF tale (albeit a bit light). I think I like space battles written by naval officers, although Hemry sometimes ventures a bit too close to describing sea manoeuvres. Light on the characters and heavy on the military, but overall I enjoyed it. I guess I was able to keep my critical eye mostly closed for once. Part of what drew me in was the emphasis of military discipline over heroic dogfights, so if that sounds dull, you may want to steer clear. The crews' reactions were sometimes forced (well, more pushed a little too far), but I got past it. The ending is soft, since it is evidently part of a series, but there is no outright cliffhanger.
Those marines were rather convenient, though.