The staff was pretty fast with signing you in and dealing with security protocols. If you are taking it in the morning though, they won't even let you in the door until they "open". I had no issues with the computers, everything worked fine (including the calculator). You are given a laminated piece of gridded paper and a sharpie... so no erasing 😕 Fortunately however, the dude that gives you paper is very attentive so just raise your hand if you need more. If you need to take a break, it probably takes 3 minutes to check out and another 3 minutes to check back in. Besides eating a light breakfast and trying to sleep early, I think you are ready to go, let me know if you need any more advice!