As per instructions it doesnt matter whether you take your doses with food or without food. Doses are 2 pills in the AM and 2 pills in the PM.
After running any test booster waiting anywhere between 4-8 weeks would be ideal. I have heard of people running 8 weeks on and 4 weeks off and repeating this. Personally I always side with caution and try to space out stacks that do the same thing.