I use them for most of my phals, and if a plant gets so big that I have to use the huge 5 or 6" pots, I put an extra plastic mesh net pot upside-down over the air cone to eliminate a little more of the center media that could stay too wet. Only problem I've had is that so far I've used large chc's in the really big pots and seen some problems but I think that is from the really large chc chunks that possibly never get all the salts cleaned out of them. My venosa lately pictured I think I used all smaller chips and it is fine.
The pots may cost more, but you can use them over and over again. There are round pots out there that have sort of a raised bottom with lots of extra drain slots; if you wanted to buy them, you could get a bunch of really small net pots and put them upside down in the bottom to make a larger 'air cone'. Just fwiw; I use both.