I interviewed w/ Google a couple of years back, didn't get hired. Interviewing is a two way street, and I won't BS if I don't know something. That said, had one interviewer who had 0 personality, 0 people skills, and didn't introduce himself. He asked one of the typical open ended questions, which was fine, we went through it a bit. At the end, he claimed there was actually a closed answer to the problem, wouldn't actual say what it was and just walked out. The two of the other few people I talked with were interesting and engaging. But it was seriously a mixed bag and didn't present a good face for Google.
Recruiter calls again a year or so after the fact. "You did well in your prior interview, but things didn't line up. Interested in coming back in?" Me - "The last impression left a pretty bad taste in my mouth. Not at this time."
Note - I was on internal referral as well as had apparently incredibly impressed the "phone screen" person (whatever that means). Of anywhere I have talked with, GOOG has been at the bottom of list in overall experience.