There are lots of quests, 100+ hours if you do everything. Joining one or more guilds do not make a huge difference in the story or other quests, though. You meet a dragon towards the end of the game, but just for a short conversation.
A demo was released before the game was (so is based on older code) if you want to check it out, though the first part of the game is a little heavy on the hack and slash.
