They're fukn amazing Ray, I'm never using standard pots again. There's a knack to packing them with Plant Magic as the holes are quite large and the soil wants to escape. If you don't pack it properly, you get soil, water or both coming out the holes when you water (like CotB mentioned). I've got 1l, 3l, 6l, 12.5l and 20l now. Look on that auction site for the top rated seller, they do discounts on multiples.. 10, etc. They arrive flat-packed and are fun to assemble, yh I'm sad.
The only slight negative I found is they boost the R/H so you need a good ventilation system. These are 2 weeks old (from seed) in 1l AirPots...
eta- the ones in post #7 are 20l bw.
Edited by Saddam, 12 February 2012 - 09:34 PM.