The title really says it all.
I played a ton of bo3 zombies, a lot of bo4, a little bit of bo2, and a little bit of cold war. I kind of lost interest in the series around the time of cold war. But my god did this map bring me back in. It got me right back into the zombies franchise. Yes, I had played the bo6 maps before shattered, but this one stood out to me among the rest.
I absolutely love everything this map has to offer. I think the location, scenery, and atmosphere are amazing. I love the haunted Appalachian mansion vibe, it really feels spooky and unique to itself. The map is huge, and every section of it has something to offer. Spawning at the far front of the property and working your way into the main mansion and then eventually the basement flowed really well. I also really loved the easter egg steps. The three rituals where you cast the previous mansion owners into the sentinel artifact were really cool. Don't even get me started on the boss fight; that was amazing.
Just wanted to make a quick post expressing this. I am not sure what everyone thinks about this map; I know a lot of people like terminus and citadel, but shattered will always be my favorite on bo6.