Bagless vacuum cleaners eliminate two of the biggest criticisms of bag vacuums—the extra cost of bags, and the fuss of removing a full bag and replacing it with a new one. You need to empty bagless vacuums from time to time, but the process is fast and simple. Plus, you can empty it any time. Unlike a bag vacuum, there’s no need to lug around all the dust and dirt until it’s full. That makes for more efficient vacuuming, and for some people, it’s rewarding to see just how much dirt, dust, and hair their efforts removed.