One phone call with another product manager, one video screening with a senior product manager, and then three in-person interviews at BCG DV (Digital Ventures) offices. Early discussions were more about my professional experience, figuring out cultural fit, and aligning my expectations to the type of work I would expect at BCG DV. In-person interviews were more technical.
Process was at times very slow with long periods of silence from their internal recruiters, but each individual I spoke with was highly professional and courteous. Communication was done almost entirely through my recruiter.