I personally thought this was a nice follow up to the first season. The only reason I give it a bad review was because of personal reasons. I absolutely hated Alois Trancy who was a sick little kid with an angelic face that smiled when people died and Claude just because Sebastian's better. I personally thought the two of them were cheap imitations of Ciel and Sebastian. To anyone who wants to watch this feel free. The review is purely based off of my own feelings. I have known people who have liked Alois.
Though I strongly suggest you read the manga instead.