I just received them, good quality in terms of construction, but be careful to wash them well and leave them outside the house for a few days. I slept in the room and woke up the next day with a terrible throat and a stuffy nose because of the smell, that's why the rating.

It’s just a slightly bulky disc, but that’s understandable considering that the weight missing from the material that would fill the gaps, since it’s a steering wheel disc, has to be made up somehow.