The only other PGs I have built are the PG Strike and the PG 00. The Wing Zero is heavier than both and more fiddly because of the wings. The mechanisms for internals on the forearms are also very fragile and easy to break. The lighting is a bit harder to set up too since all the never PGs use self contained battery/lighting setups. The PG Wing has the batteries in the backpack and has wiring running though the chest and up into the neck that can be difficult to set up. As far as I know there is no way to use a stand with the Wing Zero either, and that makes posing somewhat limited.
Overall I still think its a nice kit.