The only problem is the lack of good faction flags and the fact that you all player names come up in WHITE. This can be very confusing when you are trying to tell if someone is friend or foe. Other than that, its great. It really brings out realism.
It's already survived more than a month, and usually during the first month a mod dies. I believe that Feudal World is here to stay. I would definitely recommend it if you are interested in persistent mods like PW and PF and you are looking for something new and unique. It's like something you've never seen before.