I have only opened 2 ATs so far. The first one was AT Optimus Prime which I got before my Kiss Convoy. It looked very "plastic" and lacked painted details in bot mode compared to my previous BTs, but I was ok with it. My biggest complaint was when you display him in bot mode and there's a light source behind him, his chest plate looks very transparent and very fake. Later I got my Kiss Convoy. He's also all plastic, but Takara still applied an additional layer of red paint over all the red plastic, so he looks and feels like a BT. My AT Optimus Prime went into storage.

The other AT I opened was AT Hot Rod. I had owned Kiss Rodimus already whose quality is on the same level as Kiss Convoy, but I still wanted AT Hot Rod for his flame details, especially in bot mode. (I think the Kiss one's car mode looks better with the extra layer of red paint all over the plastic and the white racing stripes.) If you put the two side by side the with paint and without paint are quite noticeable. AT Hot Rod was better than AT Optimus though because the flame details helped to make the red plastic less "stand out". Now I keep both on my display, Kiss in car mode and AT in bot mode.