That is so hardcore!
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I remember using the UI only for a short period when I first installed the game. It most definitely added a challenge to the game in my opinion. (It also gave a reason for enchanters to use Sentinel.)
But I don't think I'm man enough to try using it again in any form. Besides the visual limitations I don't think I would be able to function efficiently without at least 4 chat windows open at any given time.
Mad props to those that are going for it, I commend you!