Green Treated is a fine value for certain applications or expectations. The problems people have with are general twisting and warping, cracking and checking. This is particularly true of the 2x2 railing spindles.

When it comes to wood deck, I prefer working with cedar because of the lack of chemicals in handling, the lightness of the wood and the nice smell. But I am really only interested in giving you want you want for your dollar, and green treated is a great way to get more square feet per buck.