Delivery was fast and I have Installed the parts quickly as I knew it was necessary to replace as soon as possible: the filter and the side brush. The first two days after installing one of these filters, I came home to find that my Roomba had somehow popped out the filter basket while it was running, which had never happened before. Also, after I installed the brush from this replacement kit, the side brush stopped spinning. Now I plan to buy iRobot filters and replace the entire side brush module so I really lost money on this purchase.