Bought 3 brand new pairs of them this March, and maybe they have seen 1000miles.

The passenger side LCA seemed to be the source of rattle over rough pavement. One and only one of the 6 ends would rattle when thumped with a rubber mallet.

With the part off of the car the ball will rattle when shaken. It is kinda disappointing. I replaced it with one that has seen 1000s of miles and it is quiet.