Glynn Stewart has written many good books. The Duchy of Terra series is easily my favorite of his works.
The rich characters and alien aliens make a colorful realm. The universe he has created with it's complicated politics just adds flavor. There is more military action in this then most of the other books but it is generally well paced and Stewart leaves plenty of room in between to develop the larger story.
I know Stewart has many irons in the fire and I'm sure it would upset some of his fans; but I wish he would just drop everything and finish off this series.