This was the last expansion i played, as such this rating is based on my total time playing the game from about the middle of cataclysm to the final patch of Shadowlands.
Middle of the road is about right for the overall experience.
Really enjoyed Mists of Pandaria and Legion.
At it's best the narrative was great, there was lots of fun things you could with friends and it was just generally a good experience.
At it's worst it's a slog that feels more like a chore than a fun experience. When i was younger and didn't have a job I could tolerate the hours, but now my free time is less abundant, it is not something i'd put anymore time into.

Also this expansion had some of the worst storytelling from all of the Warcraft mythos.