Bah the user interface is currently outdated. I think it's cause of the patch and they need to upload an upgraded version of it. When it works again I'll send you a link.
This is what it looks like:
A: You have seven rows of 10 spaces each. So 70 spots to place skills/spells/items in. Don't need to explain the huge advantage of it.
B: Your trinkets. If you have trinkets that have a use you can fast click them rather than going to your equip and clicking it there.
C: When you click someone you can see their class there. Dunno why but my screen is too far up. The "Warrior" thing is supposed to be beneath the gray bar.
D: Like C it's supposed to be beneath the gray bar. Lists what zone you're in, your loc, your DPS, your money and your EXP (+ how much bonus from resting). There's some other shit there but I don't use it.
Kill Log: As you can see the maximum damage of some spells/abilities. You can see how many times you've died and what mobs you've killed as well.
Atlas: As you can see a map of some instances. Doesn't have them all but when they have them they're very handy.
MoneyQuest: Lists the quests you currently have. You can select which ones you want to display. I have 18/20 quests but only showing 2.
Bank: You can see what's in your bank everywhere you are. Of course you can't move anything but handy nonetheless. Also lists your money total of all characters you have.
LootLink: Any item that gets looted (even if it's not by you) or linked to you appears there.
And finally this is me. Name of my character is Yukmouth (fits a Troll very nicely I think). I fucking hate my gloves