With the tightened security going into the States from Canada, my parents decided it was worth it to apply for the Nexus pass, if anything, to get through security faster. I'll update here with their times as they move through the stages:

Applied(initial): 7/23/2017
Conditional Approval:
Initial Interview:
Approved:

Hope you got your renewal. Myself and another poster on the renewal thread applied same day and got our approvals today.

Here is an update:

My application
Applied: April 22, 2017
Conditional Approval: July 12, 2017
Interview: July 14, 2017
Approved: July 14,2017
Card arrived: July 25, 2017

My son application:

Applied(initial): 6/06/2017
Conditional Approval: 7/19/2017
Initial Interview: 8/08/2017 Champlain, New York
Approved:
Card Arrived:

My wife application:

Applied(initial): 6/06/2017
Conditional Approval: 7/27/2017
Initial Interview: 8/08/2017 Champlain, New York
Approved:
Card Arrived:

My application:

Applied(initial): 6/06/2017
Conditional Approval:
Initial Interview:
Approved:
Card Arrived:

Hopefully you will be conditionally approved before 8 Aug 2017.

Applied June 8th
Conditional Approval July 31st.

HTSC

To be honest, I don't quite see the reason why there are differences in the way NEXUS is processed/used depending on the country. Locations that don't take Iris scans right now, which, from my understanding, are generally land crossings run by CBP (as an opposite example, the Peace Bridge crossing in Fort Erie/Buffalo is on the Canadian side and does do iris scans), should implement the technology to do so, as it's a relatively straightforward procedure and the technology exists already, as it's already being used at Canadian interview locations. I wouldn't have even known there was any difference in the types of biometrics taken depending on location if it weren't for Flyertalk. The GOES website only indicates in small print at the bottom of your confirmation page "Special Instructions: Retinal scans are available at this location." As far as I can tell there is no way to see on GOES which locations have retinal scans available without first confirming an appointment--an unnecessary lack of clear information. The NEXUS application page itself makes no mention of any differences in the way the card is used while entering Canada vs entering the US. I'd hate to have only taken my fingerprints, take a trip to Canada, and be rejected by the NEXUS kiosk because I didn't have an iris scan that I didn't even know existed before. Likewise, I know I can travel to Canada with just my NEXUS card, but the Global Entry kiosks are not clear in allowing one to travel with just a NEXUS card back to the US (it is possible, however, though not for Canadian Permanent Residents). All in all the procedures and capabilities of the cards can misleadingly vary depending on interview location and country of departure and citizenship.

Even though Nexus is jointly administered by US and Canada, obviously each country controls their own entry procedures. So, one would refer to information from Canada for authoritative information regarding procedures necessary to enter Canada.

The only Nexus machines which USE the iris scan are the Nexus kiosks at Canadian airports. If you want to enter Canada by Air using one of these Nexus kiosks, you must have an iris scan. If you want to enter Canada by any other means (land or sea), you don't need an iris scan.

Here's a list of the Nexus enrollment centers. Each center's entry in this list identifies whether they take iris scans (check both the Land and Airport lists).

http://www.cbsa-asfc.gc.ca/prog/nexus/location-eng.html

I think your comment is completely factual and it's hard to make sense of all the procedures involved. The way I was explained the Nexus program is that it is in fact a Canadian hybrid program that is administered by CBSA to facilitate entry to the US and back. As such, you would sign up in Canada and get Global Entry benefits to accomplish both steps, however you could also add Sentri benefits by adding your vehicle and conducting a separate interview at a Southern POE. As such, the program does not cater to US residents but to Canadians, nor is the Nexus card recognized in the US as a primary ID at non-border establishments. Global Entry is a US program and that's the one that's advertised by CBP. When you sign up for Nexus, you really sign up for Nexus and Global Entry and possibly Sentri if that's what you request, therefore you are dealing with the rules of 3 programs that serve 3 different purposes under one "Nexus" umbrella, which can cause confusion.

Applied(initial): 5/26/2017
Conditional Approval: 7/24/2017
Initial Interview: 7/25/2017 Pearson
Approved: 7/25/2017
Card Arrived: 8/1/2017

I was very lucky with interview. Initially could only find interviews in Sep but after checking many, many times (20?) somebody canceled.
Also, I noticed they accept walk ins. However there is no guarantee they will see you. I showed up in the morning (appointment at 645pm) but waited for 1 hour noticed a lot of people in line with appointments and left. Came at 4pm and they saw me 45 mins later
Interview was very cursory and quick

Applied: 6/2/2017
Conditional Approval: 7/26/2017
Initial Interview: 7/31/2017 YEG
Approved: 7/31/2017
Card Arrived: 8/9/2017

Initial interview dates were for Mid October. Kept checking back for cancellations and found one on July 30th for the next day. When I showed up, the Canadian Border Patrol didn't have me listed for an interview but the US list did. It is a good idea to print off the appointment page and take that with you. Just in case.

Applied: 7/13/2017
Conditional Approval: 8/11/2017
Initial Interview: Planning to do this either in Montreal or Ottawa
Approved:
Card Arrived:
I am also a Global entry member for last 4 years.

Applied(initial): 6/18/2017
Conditional Approval: 7/31/2017
Initial Interview: 8/4/2017 Vancouver,BC @ Main St
Approved: 8/4/2017
Card Arrived: 8/15/2017

Was able to get an interview slot in 5 days after conditional approval (Aug 4). Otherwise it would have been mid September for both YVR and Main street locations.

Applied: 7/31/2017
Conditional Approval: 8/17/2017
Initial Interview: Planning to do this in Niagara Falls
Approved:
Card Arrived:

Does anyone have experience to schedule appointments for a family (we are a family of four)? Do those appointments have to be adjacent? How do I know if one interview slot allows multiple appointments? Thanks!

There might be multiple time slots available for the same time, however each individual family member needs to be scheduled separately. There is no guarantee that all of you will be interviewed together or back to back, it depends on the agents at the time and how busy they are. Just schedule everyone on the same day hoping they will let you get in and out together.