I thought everyone was really kind and welcoming. They definitely were aware that interviewing can be stressful / tiring for the candidate, and made sure to allow time for breaks, Q&A, and just general getting to know you questions, which I appreciated. The folks seemed very smart! My mentor - one of the smartest, technically capable people I know - was very fond of this company. It was his stamp of approval (hard to get) that led me to accept this offer.