I started with taking it twice a day for two weeks and am now using it once daily. I have noticed additional energy and general feeling of well-being.
It was difficult to find a drink/mix balance that I could tolerate because it was surprisingly sweet. I've settled on one scoop mixed with 20 oz of water in a container that makes it easy to shake and carry.
I drink it periodically over the course of several hours while at work (between calls at a call center). It's not delicious, but it's palatable.
Bottom Line: Yes, I would recommend this to a friend