The process was a bit scrambled. I was contacted by a university recruiter based in the California office for a phone screen. The call was easy-going and conversational (albeit he was an hour late calling me).
Things started getting disorganized afterwords. I was told by the same recruiter that because I was a local candidate (being from the Boston area), he would have me go into the Boston process for an interview immediately upon completion of a video interview. He then forwarded the link to a pre-recorded video interview in which I received four questions, had a minute to prepare my answers for each question, and three minutes to respond. However, I was sent a link to complete the video process for the July 2016 cohort when I was interviewing for the January 2017 cohort (an issue which I addressed and he told me was fine).
I followed up about five days later and was told that I would receive an update that day to no avail. About a month later with two "thank you for your patience emails in-between", I was scheduled to have another phone screen. The person that I chatted with was polite and the conversation was brief, but there must've been a miscommunication between her and the recruiter I spoke to a month prior as she asked me if I had already had a phone-screen and completed the video process.
About three weeks later after that conversation, I received a polite rejection email. Overall, the experience was not very organized. The ADP receives thousands of applicants, so it will take some time to hear back. However, the false "hear-back dates" and miscommunication between staff makes for an annoying and unprofessional process.