I went through the conversion after my internship. There were two technical interviews.
They were all very polite, and the process was pleasant.
Surprisingly, the questions were found on the famous "Cracking the Coding Interview" book.
For example:
The following metrics were computed from 344 interview experiences for the Google Software Engineer role in New York, New York.
Google's interview process for their Software Engineer roles in New York, New York is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Google's Software Engineer interview process in New York, New York.