I have been using superoots airpots with COCO for a couple years and I love them. I just ordered a bunch more recently and they were not too much.
http://www.roguehydro.com/superoots-air-pots/ (I have no connection to this site, they sell the pots cheap with free shipping)
They have paid me back 100x over.
They are kind of like hempy buckets in that they don't look like they are doing anything - then the main root hits the bottom and BAM they explode.
Hempy buckets will cause roots to curl, superoots prune root end and allow more root growth.
I heard one complaint that, "I had to water it too much."
That is a good thing, it means your plant is eating/drinking and wants more.
I grow in probably too big of pots, 5.2 gallons with large trays. I water 1-2 times a day.
Sometimes I top feed, sometimes I bottom feed.
They are
slightly more difficult to water than inferior flat walled pots. I deal with it for the faster/better growth.
The arguments I hear against them are
"They are messy/hard to water." Not for me. I have a tray.
"The dirt falls out the bottom." Maybe a couple teaspoons worth, it takes two seconds to clean it up.
"They are expensive." Yes they are. I don't care. I have used the same pots to grow well over 20 pounds.
I use one superoots pot to grow tomatoes outside. It is no worse for wear after 2 1/2 Summers outside.
The inside pots look like new after I clean them.