Overlord is enjoyable, but honestly feels over hyped by other people.
It's good, but I was honestly expecting something better based on people's reactions, comments, recommendations for it.
I probably would have enjoyed it more if I didn't see the hype and recommendations for it before finally deciding to watch it.
I'd still happily watch additional seasons of it, but that applies to several hundreds of series I also watched.
I personally dislike CGI, but at least they only really used it for the faceless soldiers that are only there to die shortly later.