I liked it best with a product that complimented the dosing schedule of PRIME more so...meaning, PRIME goes with food and some other products say to take on an empty stomach...
I always tried to match PRIME up with a Tbooster or similar which was taken with food. It made dosing so much easier than having to eat, take prime, wait for emptying, take nonfood-Tbooster. This method always made for a late night at the gym.
Sometimes I would take nonfood-Tbooster first, wait 45min, take prime with food but that didn't work well either as I was hurrying to the gym so that the Tbooster was still well active and usually before the PRIME was well absorbed, hmmm dilemma!
In the end, I just found that Animal Test/Prime was the best pure all around stack that I ever tried. Both go down the hatch with food and together rivaled several past mixes I used.