[Dave in MD]

Amen to what Mitch said. Two of our club members had the repops just about to the failure stage. You can easily spot the repop bearings as they have 12 rollers as opposed to 14 on the original correct type. Also the cages on the ends of the rollers are held in place by all 14 roller pins. The repops have six pins holding the end cages (one between every two rollers). On both cars the pins and cages had cut a significant groove on the inside of the hub. One car had about 7,000 miles while the other had over 8,000 miles.
If one of the rear bearings locks up while driving it could be very dangerous.
I'd recommend everyone check the rear wheel bearings in their car.