Story - First, I'll say it did jump around quite a bit, the story was sketchy, but you can make out what the main objective was, the Romance could of been more prominent.
Animation - As others have said, it's Bones, I cannot stress how amazing they animate their animes.
Sound - The soundtrack was rather amazing, especially the opening song.
Characters - The characters were more or less "Meh", the crew of the ship stopped playing roles about half way through the anime which was rather disappointing. However the main character and others we're rather pleasing.
Overall - If you like bones, or have seen any other animes by them, i'd definetly recommend this one. It probably won't be your favorite, but will be one of those you remember quite well. The plot is rather interesting and unique, I was intrigued by the main character, and found many resemblences with Eureka Seven believe it or not.