Honestly I can't provide any specifics yet, just very general impressions to be safe. But I still have a long way to go before the game is finished... and Thursday is going to be a very interesting day.
This whole conversation about length people are having is a really misleading thing IMO. If we measured length alone, technically the game would measure up to around 1 hour, since thats hypothetically how long it would take someone to complete it if they rushed to the end. Estimates of time to complete the entirety of the main storyline I'm sure will be explored when it's allowed, and they might be slightly more practical, but even this is still heavily misleading, as no one in reality is ever going to skip around all of the other contentshrines, combat, treasure, side quests, exploration, mysteriesjust to reach the next primary destination.
Even from the first five hours it is obvious that this game is absolutely massive.