I am a new convert to them. I found that when I used standard garden pots, I often got roots circling in the lower half of the pot and not much happening in the upper half. But with the smart pots, I see massive roots at the top of the soil line and many fiberous roots, as well. I will say, though, is that for every size of garden pot that I used to use, I will get the the next larger size Smart Pot. I wish now that I had gotten some 10 gallon ones instead of just the 5 gallons.