I got the 5 gallon with handles and they work great. The roots get air pruned and do not get root bound as easy. They also allow air to get to the roots, preventing root rot. I wouldn't grow with anything but root pouches!
These bags are the PERFECT solution for growing potatoes. I purchased 10 of the 25 gallon bags. I dug a hole the same size as the bag and about a foot deep and placed the bag in the hole (I rolled the sides down). I mixed the dug soil with manure and put that in the bag and planted the potatoes (about one pound seed potatoes per bag). Once the potatoes started growing, I rolled the sides of the bag up and kept adding soil. It is a great way to hill them. Harvest was VERY easy! We dumped a bag into the wheelbarrow and were able to get every potato! We had no problem with the bags drying out, maybe because they were partially in a hole. These worked so well, I ordered 10 more for this year!
Decided to try instead of using terra cotta. Works just as well if not better. Aside from being cost effective, it also has the additional benefit of not having the weight of terra cotta. Allows the soil to breath better, decreasing the chance for disease from over watering.
I bought this to grow my tomatoes in. They are growing very well. They do need to be watered more often but since we have had very dry weather lately not too bad.
I use this for my hot peppers and they loving it...its cheap and space saver at the same time!