I watched this recently and loved it, if you enjoy Korean horror/fantasy dramas like Kingdom I imagine you'll enjoy this too.
I'm watching the dubbed version now. I'm 4 episodes in and close to giving up, finding it slow and boring.
Only 7 episodes for S2, took a while to get familiar with the show again and overall I preferred s1 especially with the setting, granted I can see why they've done what they did for s2 as it would have kept costs down, hopefully it gets a s3 (if it doesn't the ending wraps up enough that I'm happy)