It was an excellent series, although it could have been a bit shorter in some cases. Yes, I know what happened to her mommy, you told me 64363463 times already.
On the good side, Erin's a good character and showing her growth as will as her relationship with Lilian is great storytelling. And the little beast lord is cute too.
And it looks like Erin will have children of her own.
Soundtrack is really good. Insert songs were nice, and all OPs/EDs were of very high quality. Love the lyrics!