Here's the long and short of it - NATT is a great organization that helped me take the next step in my career. That's all you really need to know - it's a worthwhile school to attend, and my experience was very positive.
For more detail: I used the Veterans Affairs Canada Education and Training Benefit to pay for my DZ Corporate Program with NATT. Both VAC and NATT were on the ball, helping me pay for the program without a dime out of my pocket. Shannon at NATT was particularly helpful, responding quickly to my questions and providing me with the documents needed to get the funding from VAC.
The air brakes portion was conducted by Adam, who was exceptionally knowledgeable and a strong teacher. The class atmosphere was great, serious enough to learn, but lighthearted enough to have fun. When it came to the practical portion of the Z endorsement, I felt confident, and passed with no issues.
My first in vehicle instructor was Paul, who had me driving a 13 speed manual on the backroads in no time. I truly enjoyed my time working with him. Sadly my first driving test opportunity was canceled because of Covid, but NATT found me another slot a few weeks later. What's remarkable is that they got me in early on the day of the test and had Adam run over some driving and Schedule 1 information with me before the test. I passed my first attempt at the test and am now a fully licensed DZ driver!
I may return to NATT in the near future to complete my AZ training, as I'm confident they can help me through that challenge as well.