Downloaded it, installed it, launched it.
It doesn't work. It keeps doing the following loop:
1. Error message saying it can't download WorldList.xml, followed by another message telling me to try again.
2. Repeat step 1.
3. Error message saying it can't connect to the update server due to a connection error.
3.5 Error message saying brightness settings have changed and asks if I want to reset them to previous value (this stopped showing up in the loop when I finally clicked yes).
4. Displays the launcher, with a button that says "Update" which I click.
5. It downloads a bunch of files and the "Update" button changes to "Start The Game" which I then click.
6. Launcher screen disappears and we start the loop over at step 1.
Probably the best MMO ever because it doesn't allow you to play it.
Oh, and it launches Internet Explorer instead of my default browser. I hate it so much.
EDIT: I got it to work by running it as an administrator.