The story was well thought out, it was one of those animes which had everything planned from the beginning and almost or even every episode was story related. It could have had a bit more romance but there was some there. It had a great ending in my opinon, everything was cleared up and it didn't just end like other animes it ended with a new adventure.
The animation was pretty good although I'm not really the one to comment on animations since I watch basically any animation.
The action was nice, the main character was like super strong only 4 others stood a chance against him yet his fights with those 4 others were great, they last up to hundereds of hours at most (in the anime of course).
The characters were good, the main character isn't one of those guys who has strength but always questions himself and has self doubt instead he just gives it his all. The Princess is a nice character you don't get to many animes where the main character falls for a girl like her most go for the tsundere girl most the time. The side characters were all good, and the I really liked how the pilot captain came to like the main character early on instead of trying to compete with him the whole time (those characters really annoy me, the ones who interfer with the main characters romance).
Overall it was a great anime, it's probaly going to be a rewatch for me in the future, I really liked it the music wasn't bad either, I liked the song on the last episode. Give it a try.