My k1 got approved in London today and this thread was a great help!
My experience was much like everyone else on here I was nervous but the people and the windows were so nice!
Just to let people know who were worrying like me I had a visa denial on a 214(b) for a h2b work visa and I had also overstayed by 4 days.
Everything was fine and the interview was definitely more of a relaxed chat than an interview. I got asked, how we met? And if I met her parents? That was it.
Good luck to everyone and thanks to this website!!