Edit after the full release: It is one of the greatest indie games I've played, the exploration and atmosphere is almost unmatched among the other games of its category. The ending(s) were more underwhelming than I would've expected, but the rest of the new content added is great.

Despite being in early access, the game has tons of content. I'd say currently (no new content after the castle at the moment) it has around 15 hours of content if you explore every nook and cranny. Almost all of the maps has many secrets, and one or two of these secrets are entirely new areas ! The areas are also very diverse: for example, some of them were genuinely scary, while others were calming. Great game overall, very fun to explore, and combat is satisfying enough. My only complaints are the minimal amount of bosses and navigation in a few areas. Other than these, I geniunely can't find anything negative.