Agreed, this is great for us new folks. I keep a fair number of Acans so I've been boosting my Mag recently. Probably around 1,400 and I've noticed that my zoas and palys seem a little happier and more colorful. I'm sure this is in part due to Ca and Alk being more stable as well. I dose a 2-Part to keep my levels in line as my tank seems to suck Alk and Ca even with the high Mag levels and a mostly LPS/Zoa tank. I can definately tell when my Alk is low as the Zoas get PO'ed at me and the Acans shrink.
I don't seem to get anywhere near the growth that others report but my tank is new and honestly, since its small, I don't need things growing like weeds on me.