I really like it. I played in most of the beta weekends and I have it preordered. It was still slightly glitchy in the betas but most bugs were known ones.
The game is massive though, there's so much lore to it, and there's a lot that ties in with old lore as well. The world and questlines for a single alliance are incredibly large as is, but there's 3 alliances too, so there's a lot to do.
I think if you liked any elder scrolls games, you'll like this one too. Although the community seems tone slightly less communicative than in other mmorpgs, but I think a lot of that has to do with it being a Elder Scrolls game, which are traditionally immersive single player games.