Potential. XO Sisters is the epitome of potential.The series shines with a unique charm and room for development in every single chapter. The characters might not be the most well-written, and the art is amazing but it's not the absolute best. The story is pretty cliche, but with a unique spin on it. The entire manga is incredibly enjoyable and reading it is a total joy. However, it's still hard to rate it above a 7, or even a 6.
Now would be the proper time to address the elephant in the room, the cancellation of this series. It was cancelled only 17 chapters into the series, on a rather bad note, no less. With that fact being thrown out there, it's hard to read a manga/manhwa in which you know the ending is going to be abrupt and lackluster. However, despite this, it's still a manhwa worth checking out. The potential this series holds is incredible. It throws out ideas and teasers that all seem interesting and judging by the way the manhwa was going, it was going to be done just as good as the rest of the series. However, just as the story was rising in quality in terms of its story, it was axed.
It was a shame this was cancelled. Honestly, it didn't deserve it. It had enough quality to become a long running staple. The ideas were all set in place, much like a line of dominoes. However, as the first domino was knocked over, it stopped falling before it hit the second one. We'll never know what would have happened to the rest of the dominoes. We could assume, we could guess, we could wish. However, we will never attain the pleasure of seeing the dominoes being knocked over. Despite all of this, the manhwa is still worth checking out, it's short, so you won't be wasting much of your time. Just do it, and maybe one day the line of dominoes will be set back up again, with no sudden stops. I'm honored to have my first review be about this series, I just felt too strongly about it's cancellation and I had to write out my thoughts on it.