[review taken from my VisaJourney timeline]
POE was easy. Got to the border (the one at Champlain at the Quebec/NY border) around 10am and told to head to secondary with my sealed package from the consulate. Parked the car and went inside. I was only sitting for less than 5 minutes before a lady called me up. She asked me about my visa, where I was moving, when I got married, and a few other questions. She then opened the sealed envelope and told me to go over the DS-230 to make sure the addresses were right, so the green card and SSN would be sent to the right place. I was then instructed to sit down while she went over the forms. About 30 minutes later, I was finally called back up and she took my fingerprints. And not electronically, the old way with ink and paper. She was having problems doing my fingerprint, so another guy came to take them. He was extremely nice and even joked with me. He asked if my hair was my natural colour (if you don't know I have pink and blue hair XD). Once he took my fingerprint, I was then asked to sign this tiny box. The lady then gave me this paper about the I-751 and told me to sign two of them, one of which I kept. And then I got my passport back and that was it! I was at the border for less than an hour. Everyone I interacted with was extremely nice and I had no problems.
P.S. I'll write up a summary tomorrow of my trip :)