2 anecdotes ...
1) The worst interview I ever had (BY FAR) was at Google--disrespectful people, no respect for time, I could go on and on. And I went back to try again to get that money showered on me. Worth it in the long run.
2) Their new system for "performance management" is a hoax. Just like at all other places, it "documents" what you should do so they can fire you more easily with unspoken rules and all sorts of arbitrary causes as well. A friend literally hit EVERY pre-agreed target and still got pushed out for "not delivering".
Oh I've had a terrible interview at Google too!
They told me it was all about pseudocode and how I think in advance, then on the actual interview they were being annoying about variable names and spaces after comma, while I was supposed to come up with some clever optimisation that boiled down to: "do you know this obscure theorem already? Cool you pass"
I once failed all my goals agreed upon a year ago but got promoted anyways, because priorities had shifted and the director above me just really, really wanted me to continue building his reputation. (not at google)