Just came back from landing interview at Etobicoke office. The whole process is very straightforward. When we arrived at the office, the front desk gave us a number. Only about 15 people ahead of us. The waiting was not too long. The agent we had was a very nice lady. She asked my passport first, and asked the date of my recent entry to Canada. I think that's for the purpose of citizenship calculation. Then she asked the driver license for both of us and verified our current address. Following was the standard questions: have you committed any crime, have you been denied entry of Canada, do you have dependent, and have you received any social insurance or welfare. She only took one of my photos. She said they only need one. The other one is in case of mistake. The last part was we initialed and signed two pieces of paper. One for her record, and one for me.
In the end, she said I can apply for the SIN at service Canada just beside her window. I just needed to fill out a simple form, but I waited for more than half an hour. That's all my experience. Very simple. Hope everyone can get your PR soon. Good luck.