Pretty superficial compared to the in-depth interviews I've had for many other employees in Silicon Valley and otherwise in high tech. I was astonished that they seemed nonplussed at the prospect of somebody weaving back and forth between (very senior) individual contributor and (technical) manager -- that cluelessness is something I expect from big old ossified companies, but this "weaving" pattern is perfectly normal and expected in young dynamic up-and-coming hi-tech outfits (hey, I've been doing this for decades;-).