I got 'Lost at Sea' as an already avid 'Scott Pilgrim' reader and having caught glimpses of O'Malley's earlier work on his website. Don't approach the book expecting it to be more 'Scott Pilgrim' style frenetic hijinks; it's a lot more introspective, but it's very sweet in its own way. While the art and story are both less polished than the later work, lacking the slicker, more dynamic feel and the tighter plotting and snappy dialogue developed in Pilgrim there's a sincerity in that roughness that strikes a very human chord. It's a book about being eighteen, trying to find yourself, searching, being a little crazy and making friends.
While it's got a few rough edges, such as how sometimes the characters are a bit hard to distinguish and it's a bit prone to lapsing into navel-gazing, it's more than charming enough to make an enjoyable and engrossing read, and really captures the feeling of being a certain age.
If you enjoy exploring the potential of Graphic Novels, enjoy quirky and thoughtful stories or just want to have a peek at what O'Malley was doing before Pilgrim, it's well worth a look.