I interviewed at Google and some other big tech companies in late 2015. From all the big ones Google's process was the most terrible. After the initial screening I had to deal with obviously terribly placed engineers who had an "ah I need to take another interview with a non-Googler - what do they know?" kind of attitude. Arrogant, dismissive, and actually a waste of time.
In contrast, Microsoft was much more professional and a real pleasure to interview at. They have been really interested and all the engineers I talked to have been great.
Disclosure: Did not decide for any of these - went for a smaller company as it was overall what seemed best for me. Did not regret my choice even though the Microsoft offer is something I'd love to try out in a parallel universe.
In contrast, Microsoft was much more professional and a real pleasure to interview at. They have been really interested and all the engineers I talked to have been great.
Disclosure: Did not decide for any of these - went for a smaller company as it was overall what seemed best for me. Did not regret my choice even though the Microsoft offer is something I'd love to try out in a parallel universe.