The quality of materials in the cardboard, the bag, and the rubber seal seems to be the same quality as the OEM Eufy bags. The only real difference I could find is that the cardboard is a little off-center on these bags, compared with the Eufy OEM bags. The bags still fit in the docking station and this doesn’t seem to affect the performance, so I am not going to deduct any stars.I ran through several cleaning cycles after installing this brand of bag. There was no errors that came up from the robot when emptying the bag. After each cycle, I had the vacuum automatically empty the bag into the docking station. I would then manually open the vacuum compartment to make sure all materials were removed from the vacuum after it emptied itself. The results were the same as with the Eufy OEM bags. Everything was fully emptied from the vacuum into the docking station.I also checked inside the docking station to make sure there was no leakage from the seal or the bag into the docking station. It was perfectly clean inside.These bags seem to work just as well as OEM and are a good deal. I would recommend this product.