Besides the Taco, I also bought a set of fronts and rears for our Yaris, and they stuffed both sets into one box. So you can imagine how mangled they were when I got them.
Still after a while they relaxed and are just fine.
I didn't have any expectations of a perfect fit, and am happy that they laid down nicely and fit the locking posts on the driver's side floor.
My truck already came with the regular flat thick rubber Weathertechs, so I just put them inside the new ones.