If this series stopped at the first season I would give it a nearly perfect score, sadly this is not the case and during the second season they fuck everything up completely as far as the story goes, as well as any speck of physics. Everything gets really fucking stupid... They even breath in space.... If you really like this series during the first half but don't like anime that take things way too far and get WAY too far fetched. Like... WAAAAAAAAAAAAAAY over the top, then stop at the first season before the time leap otherwise the second season will ruin your good memories of this anime because it takes "over the top" to an unbelievable level. You'll just be left thinking "wow, this is just getting stupid". However don't let that stop you from watching the first 14 episodes. YOU WILL LOVE THE FIRST 14 EPISODES.