Echo the previous Mumbai K1 review in all respects.
The only details I will add are:
1. The visa interview is held by the officer assisted by a local language interpreter, if necessary.
2. My fiance was asked many questions about why she, an unmarried woman was marrying a twice divorced man. And also why not get married here in India if our families are here. The answer she gave was that she wants to live as a couple after being married and marrying inside the USA will enable us to live together immediately after the wedding in the USA. Not so if we get married in India and the she has to wait a year or so for the IR visa. The officer was satisfied with this response.
3. After a successful visa grant the following piece of paper is given to the applicant. See this image: https://tinyurl.com/yxx4p7hw