If I read this book when I was 15 and had no idea the kinds of sexuality portrayed in this book then I might have liked it better. As it was, I found the whole book rather juvenile, with shallow characters, poor backstory, and little to recommend it other than for the sex and violence.
Granted I expect to leave my brain at the door when reading this sort of book, but the characters are so shallow that I do not care enough about them to bother reading the next book. About the only character that I could empathize with was Grinder's poor lizard - the rest of the characters I could less for.
If you want something to read with a lot of good combat and fairly decent if unimaginable sex, then this book might be for you. While I don't think this book quite strays into the word porn genre, there is little substance here other than the sex and violence.
The plot is rather linear, the characters shallow and with no complex feelings or goals (other than sex, food, more loot, more sex, more power, etc.) and the plot is quite predictable. I correctly guessed who Pierce's wife was the first time. It was a rather blatant plot tool.
Dialogue between the characters is quite good, and flows smoothly. Despite a decent size cast of characters I never lost track of who was speaking to whom. The action and combat scenes are quite well described, but lacked some creativity. In SciFi, there was a whole realm of weapons that could have appeared in the story without unbalancing it.
For such an advanced society, the ships and weapons used by the characters were rather mundane. The protection of the planet seemed a little thin, and I thought of a few ways that crime syndicates could sneak weapons and drugs on to the planet. I would imagine that organized crime outfits would have been all over this planet and the opportunities it offered.
The characters are not described enough, nor are they complex enough for me to invest in them. I couldn't care what happens to the characters which means that I am not going to buy the next book in this series and would likely not buy another book from the authors.