"Succeeding at the Piano"

I belong to the FJH Music Company Club and receive quarterly packets of music to preview.  As a part of these packets, I've received copies of the new method books by Helen Marlais - "Succeeding at the Piano". 

I've looked them over and like what I see, but I've been hesitant to actual start a student in this method.  Why?  My method of choice has always been Faber's Piano Adventures.  It's what I'm used to, what I really feel comfortable with, what I like and I'm just not sure I want to make the change.  But...I want to be open to the idea, so I'm wondering if any of you have made such a switch and wonder how you feel about it.
Do you like this method better? I would love some feedback from those of you who are using it or have tried it!  Is it a method that stands well on it's own or should it be used to supplement another method?  Do you recommend it and if so, why?

I welcome your thoughts and ideas!