Does anyone here indulge in protein shakes or use Herbalife?

Bought protein shakes from Herbalife forr my athlete boys but, am drinking them myself and loving the muscle tone I am getting. Wondered if anyone else has experience with this (as I am a newbie).

I have no idea really. The only "protein drink" i use if the Atkin's shake when I forget to eat. I dont know if it help with muscle tone or not.