Update:

Interviewed (wife, kid and myself) at the International Falls, MN station today (Oct 24). Very smooth, in and out in 40 minutes.

We arrived 15 minutes before our first appointment (3 consecutive 30min slots). No wait; no other cars in the parking lot. A very friendly Canadian CBP official greeted us at the door and had us watch a 10 minute video on Nexus while he and the US CBP officials (there was a trainee and a trainer) sat in the room across us with the door open and punched at a computer. After the video my wife was called in first (open door still) photographed and finger printed; a few questions more along the lines of "hows your day going?" and then I was asked to step in. Same routine. I was pulled for customs secondary a few years ago at MSP because I had an apple in a checked bag. They asked me about it and I explained that I had no idea that it was placed in there (likely by my mom). Then finger prints and photo. They only took a picture of my 2 year old.

Then the Canadian official explained the program (TSA Pre; Global Entry etc.) and asked us to go over the border and at the Canadian crossing let the official know that we were there to get our iris' scanned. We did that (its literally one block over and across the river) and at the Canadian side were asked to park our car and come inside. Quick iris scans and we were out and back in the US within 15 mins. Oh and we received the updated email while we were still in the parking lot in the US Nexus office.

Told to expect our cards in the mail in 2 weeks. Will update after receipt.

Thanks to everyone for the excellent info and support on this forum and good luck to everyone else.

Timeline:

Jul 27 : Applied (wife, kid and myself)
Sep 24: Wife conditionally approved
Oct 3: Kid and I conditionally approved
Oct 24: Interview and final approval