absolutely agree with skj. The pay is decent+, the perks are very good, but the most impressive thing has been how intelligent and competent everyone is. Going from my previous job to Google was about the same experience as going from my decent high school where I was nearly valedictorian to a top-tier university where I couldn't even keep up with honors physics - that moment of "oh, wow, I thought I was amazing but there are a ton of people here who take that level of ability for granted."

I think eventually you stop feeling impostor syndrome but it hasn't happened yet for me :)