As other reviews have mentioned, the interview process was long and very through. I was brought in to meet with various contributors in the company, although the process was a bit longer than I have experienced in my career, everyone was very helpful and extremely friendly, During one of my breaks sitting in a conference room, one of the employee's that wasn't involved in the interview stopped in and mentioned they had seen me interviewing and saw I had a break and asked if I needed anything, offered me a drink and asked if I needed anything or if I had any questions about finding the facilities in the office. I was extremely impressed with the welcoming environment they have at Agios and the willingness to assist.