Story might be a bit dull for some people but its worth a watch if you like adventure/romance kind of anime.
this is not a anime for those who values their time as it might not be a good cup of tea for everyone. if you are a anime die hard its worth a watch. the story is not finished since the author died without completing it, just like zero no tsukaima.
the main character of this anime is very overpowered just like Kirito in sword art online, to those who dislike strong character and is looking for weak characters in a anime, then this one is not for you.
story may be pretty predictable at times but overall i enjoyed watching this.