I'm currently using big bud for the first time too. I heard it's pretty good. I'm actually doing an experiment right now. One half of my room is getting watered with my regular nutrient mix and the other half is getting watered with a slightly weaker nutrient mix and big bud. Remember, big bud increases ppm by 300. If your thinking of adding something new to your fert mix, I'd recommend trying Sweet. It's made by botanicare and gives plants a lot of carbohydrates. My friend used just sweet and a two part grow and bloom formula and got great results. Lots of crystal and a sweet taste.