I had a weird likability progression with Losers. The beginning completely turned me off, the middle was interesting, and the ending riveted me. No joke, but if the epilogue was a full length novel I would be itching to get my hands on it. Most of the rest of the book, not so much. Th initial characters are completely unlikeable including the narrator and over the course of the journey they become more interesting.
Barnes keeps up the great sci-fi tradition of taking something that might happen and pushing it to it's very farthest limit to see if it's interesting. It's really cool to see an actual sci-fi in YA (vs dystopian) and I look forward to seeing more in the future.