This is regarding my first and recent GMAT attempt in Delhi Yusuf Sarai center (also my friend's Attempt in Noida centre).
I read that Yusuf Sarai center is the best in comparison with any other center in NCR. Though somewhat it is correct but there are few points that you must keep in mind if it's your first GMAT attempt. I wish someone would have told me this before but it is astonishing that nobody mentioned below points before or maybe i didn't researched so well. so the points that must be kept in mind are:
1. There is proper palm scan and verification which takes almost 5-10 minutes, which was normal according to the expectations but the problem came in the optional break. So firstly, you will have to keep the record of the time yourself, one shady clock will be inside the test room and one will be in the locker room. secondly, you MUST return back to the seat at least 2 min before the final 8th min as there is a palm scan again before entering the room (I dont know why, maybe i will switch myself with other person and cheat in this 8 min, such useless move).
So, my friend who gave his exam in Noida center came back on the 8th minute. there were already two people in front of him due to the time taken for palm scanning, which resulted in his 1-2 min loss. SO KEEP THIS THING IN MIND.
2. There is only one wash room, so manage your time accordingly. Sometimes you getlocked inside it (Noida Center).
3. If you bring your eatables along, keep it outside the bag as you will not be allowed to touch the bag during exam. don't carry Redbull if you haven't tried it before (my case).
4. If you wear a cap during the exam, chances are the person would come in between the exam, interrupt you and take your cap, which will again result in frustration and time waste (it happened with my friend in Noida center).
5. If you have not tried the ear plugs/headphones for cancelling the noise before, it might be difficult for you to use in the exam. As i used the headphones provided in the center and trust me my first 4 min were wasted as i couldn't comprehend a very easy Quant question.
6. There is always nervousness, which might again dip your score. So be confident.
These are the points which are on top of my head currently, I will update if anything comes up. Feel free to add more points. because of these my score dipped. Anyways, i attempting it again in the month of October hope i get a good score this time.
cheers!! and all the best.
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Kudos

if you find it helpful.