Its actually good. I also like how the story flows. The ending is open ending, I guess?
But there's a lot of question to be ask in the story.
Who is the God of hand? because they did say who it was right? Also hikaru did not even say to akira his secret even though he is going to say it to him. I also do not like how sai disappeared like that? Because it is really fast actually. Lastly I think that the author plan for a sequel of this given how the author write the ending. But a lot of years have passed and no sequel. So I think the ending is like that and we don't know what will happen to the two rivals. Who will be the God of hand and such.
Hikaru No Go