In 2005, it was a wonderful, prestigious place to work with many great people and a startup vibe, the place was vibrant. By 2013, Larry and Sergey were put out to pasture, and the company took on a much more bureaucratic, compartmentalized feel.
I was working hard, most of my work was fighting bureaucracy and optimizing what I did for the horrific perf process, and going through constant re-orgs so that I had no consistent manager, and no chance of promotion (this is a big deal at Google). Joining in 2005 was the best thing I've done for my career, and leaving in 2013 was again the best thing I've done for my career. I value the time there, but the Google that I remember no longer exists.