It used to be the completely most popular training type of all way back in season 10 when I started, everyone seemed to love and recommend it. I think it has fallen out of favour a bit now but if you have a guard that can drive and create their own shot it is a beautiful thing.
Probably Dire, mllama and Iwen the NT coaches are best to comment on it but I think it is a really good type of training to do from time to time. A well balanced guard is a good guard. Just don't create one of those one on one monsters we all see on the Tl that have wondrous driving, handling and JS and inept JR, passing and respectable OD.