Gravity flower hardener?

I'm thinking about investing in this nutrient. Does anybody have any experience with using it or know anything about it?

I had experience with this item, BUT it doesn't produce results quick. I would try it but i'm not sure if it would decrease the potency of plants. Warn me if it does anything bad to the plants.

gravity makes the nugs tight and hard as rocks if you use it right. I think you only use it once or twice right like three weeks to harvest. Its best when used with bushmaster wich you use at the transition period between grow and bloom