L1, L2 Visa

Big thanks for this forum; it gave me confidence to answer any kind of question. Sharing my experience as below.
We (me and my spouse) reached Chennai on the 13th late night and took Ola from the airport to the hotel. Note: Chennai drivers ask for an extra 100 rupees; keep cash handy in case.

OFC Appointment:
 
The next day, March 14th, we had an OFC appointment at 12.30pm. Around 11.30 am, I was trying to book Ola or Uber, but none of them were available. So we tried to look for an auto outside of the hotel. One auto driver approached us. We got into the auto and asked for a charge, and he said, "400 to/from and 100 to wait." We said you didn't need to wait, but he didn't listen. We had to pay 500 for a 5-minute distance. It was huge scam.
OFC was quite smooth; they asked for two sets of I-129S, I-797 (first page), DS-160 confirmation page, and passport.
Please do not carry bags, smart watches, etc.; they will ask them to keep them in the locker.
After OFC, we went down to take photos; they're not needed, but we took them for safer side.

Consulate Interview:

We had a consulate interview at 8.30 am; we booked an auto from the hotel and reached around 7.45 am. There were huge lines in front of us. A security person checked our appointment letter and let us in. After security checking, the person sitting at the table will ask you to sort two sets of I-129S, I-797 (first page), DS-160 confirmation page, and passport and will put a rubber band around them. Then you need to enter another building. They will ask you to submit fraud and detection fees. Please create a demand draft in favor of "US Consulate General, Chennai." ($500) This worked for me. After DD submission, you need to visit another window, where a person will verify everything After this final leg, the consulate interview, there was a huge line in front of us. After almost 1/2 hour of waiting, our turn came.

Me: Good morning
Officer: Good morning.

Officer: How many years have you been working for this organization?
Me: 5 years, but I have a decade of experience in specialized knowledge. (important to highlight)

Officer: Your salary in the US?
Me: Answered

Officer: What would be your position in the US?
Me: Answered

Officer: Could you please explain your specialized knowledge?
Me: Answered

Officer: Tell me about your project. what you will be doing? Why can't it be done from here?
Me: Answered.

Then he asked questions to my husband.
Officer: Sir, are you currently working?
He answered

Officer: Would you continue the same in the US?
Husband: Yes

Officer: Your Visa Approved!!
We were out of the consulate building by 9.30 a.m.

Some useful notes:
1. Be honest.
2. Be calm and listen to questions carefully.
3. Do not carry any electronic devices, keys, etc.. Keep your phones at hotel only.