I followed it with my vizsla and found it good. It is pretty rigid in regards to how the dog is kept and given “free time” - very much along the lines of a farmers work dogs that are not pets as such. This relaxes towards the end though when the dog is given more freedom as it become more disciplined. My three sons were under 5 when I did it so it was difficult for me to stick strictly to all his methods and I let it get to me a bit. In hindsight I wouldn’t be too worried as if you do the majority of the training I think you’d end up with a good hunting companion.
There is also a lot of supporting material with his podcasts and the Facebook group you can join.