I should say right off the bat that I do like the whole "shooty death kill" sci-fi sub-genre, and David Drake's "Hammer's Slammers" books are TOTALLY that. And, frankly, not a whole lot more...most of the books in this "series" (quotes because it isn't really a series, just a bunch of novels and short stories dealing with the same mercenary organization which have a consistent supporting cast, but generally different protagonists)basically star the "super tanks" and follow a very consistent pattern. VERY consistent...like, kind of almost the same story...
Having said that, this book is actually quite different. Centering on a small unit sent to "feel out" the situation with potential clients, the novel is structured more like an old western movie, and as anyone who is a fan of the show "Firefly" can tell you, combining western story elements with science fiction can work very well, if done well. It is done well here.
The "Hammer" tales can be pretty darn thin on characterization, but this novel (novella? it's really quite short) is a pleasant exception, with better drawn characters than the norm for these books. The setting of the planet is well drawn, the factions are a little too "scum and villainy", perhaps, but they are FUN bad guys, and the action is fast and entertaining. The plot is reminiscent of "Yojimbo/A Fistful Of Dollars", but well constructed, with enough twists to keep it interesting without getting needlessly complicated. And again, the action...Drake is a master of writing a rollicking good action sequence, and he's at the top of his form here. The sequences are quite graphically violent, which may be a turn-off to some, but Drake is a combat veteran, and actually wrote a very interesting explanatory prologue to one of the "Slammers" story collection where he discussed his reasons for making his violence actually hurt. (This little "essay" is well worth reading in it's own right and for it's own merits.)
Overall I'd have to say that this is the best of the "Hammer's Slammers" stories. It's also the most atypical, which may account for that...? Fans of military science fiction should like it, and it's a good "intro" for anyone who hasn't read much of that kind of book but may be curious. Also any "Firefly" fans will likely dig it.
I feel I should mention that David Drake has done what I consider to be much more satisfying character building in some of his other series than in the "Slammers" works. Specifically, the "Lt. Leary Commanding" novels combine his flair for action with more thoroughly realized characters. Those novels all have a serious naval flavor to them, and are excellent.