Me personally, I love this game. Although it takes a great deal of time to complete everything, its very fun. I would say that the graphics are very good, the sound/music of the game is amazing( I wonder which orchestra they used for the music).
The replayability is great. You can play it any way you want to, whether you want to start with one of the factions, search for all the ruins/forts, kill alot of people, or just complete the main quest. You can basically do everything and anything you want, and take as long as you want to do it. I love that kind of gameplay.
Overall, I think this is an excellent game with many different things for you to do, great sound quality and music, great graphics, and alot of action, drama, and suspense. As it says "Live another life, in another world".