I like the integrity it has and it is a unique piece, I will say I have seen people try to do a head like this before and most have been miserable but good job making it work.
With that being said I still have this feeling that something is missing in terms of the detail, something about this piece makes me feel like it in unfinished.
I'll give you a 6.5/10 (average)
I would never call this piece bad but I also have a hard time calling it "good".