The are two rounds of interviews held at the Company office site. Usually the interviews are held by a head recruiter and/or managers and higher position personnel.
There is one 1:1 interview during the first round, which lasts about 30 min. The questions are mostly behavior based and related to the resume.
Before the second round, there is a pre-interview dinner held usually by staff and seniors. The second round consists of Company overview presentation, three 1:1 interviews, and a lunch. The interviews last about 30-45 min each, and all have behavior based and resume related questions. At least one interviewer will be a partner. After the second round interview, candidates will usually hear back by the end of the same day for an offer.
Generally, everyone is very friendly (probably the most friendly employees among the Big4) and the office is clean.
Advice:
1) For on-campus recruiting, speak to the recruiters as much as possible at school organized events. Also, ensure to attend PwC organized events, and speak to recruiters and anyone above manager level. Recruiters will pick out who they remember when selecting first round interview candidates.
2) Always send thank you e-mails to interviewers after the interviews (usually within the same day), since not sending one could be detrimental during the recruiting process.