My favorite part about using the gryphon system is the groove that I get into when I am making phone calls. I don't have to hang up and I can track what each phone call said quickly after they hang up. The DNC service has saved me a lot of money in potential lawsuits as well.
They online website and interface could be a little more user friendly and better looking.
I can track my numbers as far as dials to contacts ratio to evaluate the quality of leads I'm calling.