I recommend MHI to anyone I know who likes to read. So far I haven't found anybody that didn't like this book, and that includes my daughter and my liberal sister-inlaw from up north.
I've got one of paperbacks that he self published and it is getting pretty worn out from all the folks that have read it. I would have to say that if there is one word that sums up this book it is fun.
I tend to like the gun porn and Z's shotgun is another character in the story, but it isn't really too overdone.
When you finish MHI here is a link to a short story set in the same universe that you might like. I recommend finishing MHI first or it will give away some of the surprises.
www.baen.com/tanya.asp