The only bad thing I have to say about Hal Spacejock is that it's going to cost me $18 to pick up the second volume in the series. I'll still do it though, because this was a great book.
It's very funny. I laughed out loud several times while reading (so it's probably a good thing I didn't bring it with me to read at the doctor's office the other day, because who knows what they would have thought). It's also a great adventure story with lots of action and adventure and explosions, and a few fires, and some radioactive gunk, and a lots of other cool stuff. I'm going to go ahead and say that I agree with Tom Holt's blurb on the front cover; This is better that Red Dwarf.
Sure, the main character's kind of a jerk and a total incompetent, but that's okay, because he's a lovable incompetent jerk. Hal Spacejock kind of like Homer Simpson in space, only funnier and way more macho. I give this book the full five yo-yos.