ive used 707 before, was very limited with npk ended up switching to the Roots Organic. I think it has alot more good stuff to begin with, worked for me as I have not making my own soil mixes. My last series I used Foxfarm and I agree it is junk, Switching back to Roots.
Also just picked up 10 bags mmm3 mix
http://www.jfmmm.com/
I doubt it will go all through flower with out anything but hey we shall see!