Brush roller too big for my connected Botvac d3. It installs well, but it rubs all over the case and makes more noise as a result. Also, my battery will run out before I finish the whole house. The filters have no mesh cover, making them almost impossible to clean. The filters are also incredibly difficult to remove to empty the bin. So much so that I'm tempted to grab a pair of pliers or a screwdriver to help pry it off. With filters from other unknown brands, this has never been a problem.