The story of Elantris is a little less harsh than other Cosmere sequence stories, but that doesn't make it any less good. It's also one of the more geographically contained stories. For the most part, it only takes place in 3 cities, 2 of which border one another. The book ends without a necessity for a sequel to 'finish' the story, and most (but not all) of the loose ends are tied up by the final chapter. While the author has indicated that Elantris happens before any of the other Cosmere novels, it isn't as engrossing as any of the 'flagship' cosmere series such as Mistborn or the Stormlight Archive. Two large parts of the story are a giant chasm on the landscape and 'Domi', the god of two of the people in Arelon and Teod. If you've read the three Stormlight Archive books or Arcanum Unbound, you can guess who 'Domi' was and why that chasm appeared. If you hadn't, I'd imagine a reader would wonder why it wasn't addressed. I would probably recommend Elantris to people looking for mostly light fantasy, but not as a primer to other Sanderson works.