I head plants grow faster and are a lot healthier when using those smart pot grow bags. 
That's what I'm hoping. I'm a new gardener looking for economical ways to grow veggies.
I heard you can grow head lettuce which I thought was amazing. I never realy thought about it. 
I'm going to try growing potatoes first. It'll make it easier to add soil little by little once the potatoes are already in the ground.
How do you grow potatoes in a box? Just by adding the soil slowly like you said?
Well, the grow bag will make it easier for me to add the potatoes deep in the soil, then once they sprout I can add a little more soil, and once they get bigger more soil again.
Did you get the 6-pack of grow bags?
I bought one 15 gallon grow bag to start. I might buy more if I like how it works.
I heard that the bag can leak because of the thin fabric so I would prepare just in case.
Yes, it's supposed to let water out so the plants don't get root rot.