The entire interview process took a long time, over two months if I'm remembering correctly. That part wasn't so great.

However, as stressful as a full day of interviews is, I actually appreciate it now. My stress about technical interviews has always been that if I'm asked about something I don't know, I come off looking like an idiot, and that is their only impression of me. The four-plus interviews meant that even though I drastically flubbed one, that wasn't their only impression. Of course, I still didn't do well enough for Google, but I don't feel like I represented myself terribly because I was able to express different sides and answer a variety of questions.

Compare two trees using a depth-first search.