Excelsior LPN-ADRN

I am seriously considering the excelsior program for my associates RN. I have been an LPN for 6 yrs and am ready to take the next step. Excelsior is my only option if I want to do this. I have already checked with the WA nursing commission and they except the program to sit for boards and may states will endorse the license after so many hours of experience. My question is to those whom have taken this program and are now RNs. Do I need the extra study material from these publishing companies, or are the materials from Excelsior enough to pass, if you are diligent? I really want to do this, but obviously I want to make it to the end and I need some honest feedback. I would love to be able to attend a RN program, but I can't since I need to work full time. I also only have my LPN credits, so it would take me 4 yrs elsewhere. As any LPN would understand, I already do the same work as an RN. I might as well get payed as I deserve.