Visa Stamping from Canada/ Mexico

Some details on Vancouver consulate which I wish I know before hand:
1) Backpack: I took my backpack with phone. A rude lady gatekeeper said there is no place for bag pack. I asked Starbucks but they said they will not keep the bag and suggested Quiznos (across the consulate). Quiznos took $20 cash and kept the bag.
2) File folders: I took a lot of files but was not sure if they will allow any carry bag . I kept all my files in plastic shopping bag and it was allowed. I even saw someone carry a cloth shopping bag.
 The only thing the security asked is anything sealed. I told my employer tax docs are sealed & they opened the envelope to check.
3) Consulate change: Initially I started my DS 160 with Calgary (did not submit) and then booked appt for Vancouver. When I submitted the ds 160 (after booking the appt), the system asked where you want to submit , so I selected Vancouver. I emailed Vancouver consulate that I have Calgary ds 160 but appt is in Vancouver. Consulate replied "You may use the DS-160 that lists Calgary as the location. We should be able to transfer your case once you arrive for your appointment".
At the embassy when I told the lady at entry - she said there is no issue and mine shows as Vancouver.
4) I am PR who lives in usa. I was not able to find any appt when I selected ‘Yes’ to the question “Are you applying from outside Canada”
 I called the 7032494643 visa call center and clearly explained that I am PR who lives in USA so the agent said I can still book the appointment as "No" and I was able to find a lot of convenient options.
5) Courier: I made the mistake of paying $20 for courier. Once I paid, system did not let me change the option to pickup. I should have just picked up from post office. Probably wasted 1-2 days because of courier.
6) Dress: I dressed professionally but in Vancouver consulate the way the office layout is, the VO will never see your pants/shoes so no need to wear uncomfortable shoes/heels. In New Delhi, the VO sees you approaching from the front so you need to dress up but in Vancouver you turn to the left/right for the VO window so you lower body is not visible to the VO.

interview

VO: give me a passport
ME: Done
Vo: where do you work ?
Me: employer name
VO: how long with this company?
Me: 7 yrs
Vo: what you do?
Me: I work as a BA
Vo: do you know how much you make ?
Me: yes with amount
Vo: what is your highest degree?
Me: Masters
VO: in which stream ?
Me: MBA
Vo: her expression said she wanted more info
Me: so I said mba from Usa, university of ....
Vo: gave me the rights pamphlet. your visa is approved and will you be ready in one week.