I played for a while today. It certainly feels a lot like Rorona but it's much more refined. I do like that getting license points pretty much requires engaging in a wide range of activities. In Rorona I would figure out what requests were the easiest to complete and spam the heck out of them (and I 100%ed everyone on my first playthrough by doing that). I also feel like the game emphasizes adventuring (healing, bombs, etc) items a lot more. Other than perhaps a couple of the boss fights you could basically get through Rorona without ever using them. In Totori you're going to at least make sure you have healing items on hand because (at least this point in the game) nobody else has healing skills.
Anyway, enough comparisons to Rorona. The game is a lot of fun. You had better like doing sidequests, though, because in some sense that's all that this game is.
An aside, but regarding the pre-order bonuses: Since when has a tiny 30 page pamphlet qualified as an 'artbook'? I've noticed this trend a lot lately and I don't like it. It's worse than the Catherine 'artbook' and certainly nothing like the gorgeous hard-cover book I got with Rorona (which admittedly doesn't have a lot of pages either, but at least they're bigger pages).