Airpots rule, no ifs ands or buts. Some people prefer smart pots -- I tried'em, have'm, they're sitting unused and i'm still on air pots... i actually own around 75 of them at this point (just got down buying 50 in bulk of the 1.5 gallons. I find the smart pots grow a plant around 150-200% of a regular pot the same size. The holes make it EXTREMELY easy to do tie down training (i use string and paper clips). Watering takes a bit of getting used to but once you get it down it is not that bad. Can definitely be a bit messier than normal pots, but some things are worth a little extra effort in my opinion. Yes, the trick of watering them is to loosen/moisten the top layer of dirt a bit before you start putting water in and to let the water flow slowly rather than dumping it in (which is better for the soil). Transplanting is super easy with airpots -- no turning upside down, you just take the pot off of the plant (not that transplanting is all that hard anyway, but hey)... When I pull a plant down because it's a boy or done for harvest, it has a SOLID root mass that is almost all root and very little soil -- you can't even separate the two practically. I can grow a plant 50-100% bigger in an airpot than a regular pot of same size before having rootbound issues, which means bigger buds. My biggest airpots are 5 gallons, but they'll grow plants like a 7-10 gallon regular pot.
My issues with smart pots -- probably great if you are planning on leaving them in one place until harvest and not moving them -- otherwise the soil shifts and moves. Airpots allow the soil on ALL sides to breathe, including underneath the pot -- air can freely move under an airpot, meaning you can water thoroughly without worrying about overwatering ever -- smartpots get no air on the bottom except on the outside. I tie down a lot, and airpots are a pain for that (no solid surface). There's nothing wrong with smart pots, it's just a matter of personal preference, but there are differences.