We used ATI in our LPN program. I think it was good. At the end, I took the predictor (like 180?s) and I dont remember what I got on it but it translated into 98% chance of passing NCLEX-PN on first try. And I did with minimum of 85 questions.
I also took Kaplan in my LPN-RN bridge program, I felt they were about the same. I got a 72% on the Kaplan predictor, and that translated into a prediction of like 94% chance of passing NCLEX-RN on first try. And I did with the minimum of 75 questions.
If I had to choose I would say Kaplan though was most like the NCLEX.