Good shounen show with very little filler compared to the rest of the genre - the series ended where it did due to having caught up to the manga it is based on, meaning it will likely be at least a year until a second series, and probably a while more, given the rate at which manga chapters are adapted to episodes: it is published weekly, and the average has been around 2 chapters per episode, thus a one-year break would create enough material for roughly 25 episodes - my bet would be for Winter 2014, which would give them around 70 episodes worth of material before they catch up again (40 episodes worth during break + 20 while those air + 10 while those in turn air, +- a few to allow them to stop at the end of an arc).
