I finished it yesterday, watched a couple of episodes on Saturday and the other two yesterday.
It was...OK. Overall it's nice, has a good tone, eastern eggs, its consistent, but in my opinion it lacks action. And from the few action scenes half of them are fights between humans, in an anime about Castlevania that's just a NO for me. But well, in general is not bad so I won't complain to much about it either. At least it seems they actually cared and tried to do something solid, its just their budget was limited.
Pd: I still have hope for a Darksouleske Castlevania title.