I had a free Music trial for a bit and tried out Spatial.
It was neat on my home theater, but not groundbreaking in my opinion, and there wasn't a ton of it to make use of. It did use Dolby Atmos if I recall correctly (playing back through an Apple TV 4K). Maybe it's more impactful if you have headphones on - but then you lose the entire body experience that you gain when sitting in front of good speakers....
In the end, I didn't chose to keep the service. Even though I'm fairly invested in Apple hardware, it wasn't impactful enough to overcome the convenience of having Spotify on absolutely everything and everywhere.