Otter 11, based on the manga originally thought up in "Bakuman", is not the best manga out there by any means. In fact, I would not recommend this to anyone at all unless they've already read Bakuman.
The story itself is exactly what you'd expect after reading Bakuman. It is about a half human, half otter living in human society, and the implications of such a place.
The problem is that the story isn't actually that good, nor the art, nor the characters.
The story has the depth you'd expect, but is not interesting. I was bored within the first 10 pages, and forced myself to
read on due to my love for Bakuman.
The artwork is at a necessary standard for the story, but doesn't surpass any high expectations one might have for it.
The character Otter 11 is interesting and deep, but everyone else has no significant or interesting role in the story. While the character himself, Otter 11, may be interesting and deep, with no decent story, he is not interesting to read about.
Overall, Otter 11 is not an incredibly good manga. It is more a tribute to the fans of Bakuman. So, if you have read Bakuman, it is worth a read just to see what they have done with it and to get an idea of what the "Otter 11" story within the series is actually about. On the other hand, if you haven't ever read Bakuman, stop reading this review and go read it. Then come back and give Otter 11 a go.