Why did I take it twice? Because it is difficult!!!!!!!
Yes, they allow dictionaries but only in book form. No electronic dictionary, palm, computer, telephone, or anything like that.
After the first time, when the names of the successful examinees were published in the ATA magazine, I noticed that only one passed the exam. He proceeded "sin prisa pero sin pausa", until the very last minute. I remember him writing, erasing and rewriting. And that is what I did on the second occasion, and it paid off. The first time there were 10 of us; only one passed. The second time there were close to 50, only 4 passed, I among them.
If you have any questions, concerns or doubts, or if you need any advice do not hesitate and contact me.
Good luck!