OptimusPrime - hi and welcome to icmag! i could write a long answer to your question because there are many reasons, but briefly, the 1 square foot screens are a quarter the size of my cab allowing me to get 4 plants in there - each of which will yeild 2-3+ oz. being individual their heights can be adjusted to get an even canopy. they are small enough to be able to chuck plants in there after usually between 2-4 weeks veg and then fill the screen with stretch (the repot from 1 to 4 gallon pots also encourages stretch).
if that doesnt answer your question then feel free to ask about a specific aspect