Since there may be some variance between franchises (I’m guessing the mall versions are on the low-end), stack your best Panda Express meal ever to your best Chinese food eating experience (10) and your worst (1).
Personally, although I haven’t traveled to Asia, I have had some mighty fine americanized Chinese in the Northeast (along with some more-than-decent samplings on the west coast of the US). I’m not super adventurous with my dish choices, (i.e. no lung), but I consider myself fairly rounded, having tried such things as Winter Melon soup, Slippery Chicken, Peking Duck, Crabs in black bean sauce, cold noodles in sesame paste, etc.
On the flip side, I’ve managed to hold down some borderline-nightmare orders of the most basic Chinese dishes from the heartland of America as well.
All in all I give Panda Express a solid 4. I’ve only eaten at one PE, if that matters.