I found Leviathan Wakes to be a very enjoyable and intense SF ride with a perfect amount of tension and interest.  While it starts out as an asteroid-belt detective story, it ends up dealing with far higher stakes.  The book was full of great characterization, simple and powerful prose, and interesting events.  It captured my attention quite thoroughly.  I picked this one up as part of a reading group, but I’ve now dropped the rest of the series onto my too-read pile and I’m looking forward to finding out what happens next.