Patience is indeed a virtue! :-) I just got my Green Card, so I would like to share my experience and timeline for everyone's refe...

There is no harm in bringing a copy of that. I asked my employer to give me a scanned copy of the approval notice and they did.

Yes

My interview was at 10:15 in the morning. The IO did not say right away that it was approved. He said he needs to fully review my application so...

Yes, please remember all the addresses and dates. And yes, the officer asked every single yes/no question from I-485

I just got it today :-)

It should not cause delay to your GC process. I traveled out of the country in February this year and was able to come back without any issues.