In general, it was pleasant and funny. The guy, who was asking me technical questions, made me feel his friendly smile on his face. I was not disturbed or felt bad because of my wrong, incomplete, or inefficient answers. After each question, the answer was clarified to me, where I was able to argue or ask questions about that. The interview took a bit more than an hour.
The things I remembered from the interview:
Had fun, was pleasant,
Learned new things.