I'm 3 hours in (I'm a backer, so I got access to both Steam and GOG versions), and so far I love it.
The game is visually good (espacially the landscapes, which are gorgeous), the soundtrack serves the mood, the combat mecanics are just hard enough to be challenging on normal (it might get repetitive after a while, though, especially with the lack of a terrain factor - for now, all the fights were on an open field, and the only obstacles were my own troops. Not the cluttered battlefields of an "expedition conquistador"), and there are interesting choices to make (allow a band of refugees to join my caravan when I'm already low on food? Ask the young warriors to fight, or send them back to protect the civilians? Use my fame to buy supplies, acquire a magical item or level my characters?) that should ensure some replayability, esp since losing a battle is not supposed to end the game.
And the map (which doubles as the game encyclopedia) is really, really cool