I think his face may be protruding a bit far. As in, his face is a little too far forward. But from the front you can REALLY see the likeness! I'd say it's pretty spot on for the most part. Can't wait to see where you take this.
What are you using this model for? When looking at it in the marmoset viewer I noticed the see through faces inside his jacket as well as his pant legs. If it more of a posed statue piece I don't think these would cause any issues but if it's interactive, it may be noticeable. The model itself looks great in the pictures you posted.
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https://www.artstation.com/artwork/monkey-d-luffy-15d9fdcc-b958-47de-a7c4-1e831f04fbea
I got the hair done also.