Congratulations on getting approved! Yes, USCIS tough, and it should be always taken seriously. Immigration has a lot of small but important nuances.
Couldn't agree more. They're a government agency, not a friend, who seek to deny not approve cases, unless you give them all forms and evidence to prove otherwise.
I disagree with this statement. I filed I-485 with a good, competent lawyer, and I'm glad I did. No RFEs, no issues, relatively fast approval and total cost of under 5K including filing fees back in 2019/2020. Otherwise, I'm not sure how many mistakes I would have made.
Agree with this. Immigrant should be proactive. Also recommend signing up for USPS Informed Delivery. Also recommend not moving while any USCIS petitions are pending, because moving creates a lot of potential for mail to get lost.