You have to be a bit more careful when putting them on (or back on) that buildups on tops and bottoms of frames does not push some webs up or down from its neighbor. This results in stories that workers move eggs around. Wire excluders can be distorted too but not as easily.I read somewhere that some plastic QEs are hard on the wing of the foragers. The one plastic one I have seems smooth enough, but I chose to go all metal. I know the wires are smooth. I can also set the metal ones out for the bees to clean up, afraid a plastic one might warp like the plastic frame I accidentally left out in the sun.
queen excluders or honey excluders????dependsMetal excluders are easier to remove for hive inspections. The plastic ones don't stay stiff and straight as you remove them, so bees get flung around when removing them as they are stuck down with wax and propolis, and they tend to snap as you lift them up. I prefer the all metal excluders myself.