I do Hydroponics and am sold on it completely. I have had very good results with my EQ; 400MH and a 2x4 Ebb/Flow Garden for vegging and a 400HPS and a 3x3 garden for flowering, which I got a Homebox tent for.

Cool is right, its not as forgiving but if you can monitor your garden daily, it rocks.

I had pump connection go out on me in my flowering box yesterday, the plants looked really bad. 10 minutes after feeding started, they looked great again.