buy this eureka 4870mz Boss Smart Vac about 3 month ago . I base my decision on research with consumer report and the hundred of positive review in this forum . from the time I get it assemble and its first use , I realize I have make a huge mistake . this be the noisiest vacuum I have ever own . it have a constant shrill in addition to the unpleasant motor noise . it be so bad that I take it in for service to see if something be wrong . repair shop say nothing be wrong and give it back to I . next , this vacuum be very heavy and bulky compare to other I have own . if you have stair to climb and\/or clean consider another cleaner . like other have mention on this site the foot pedal handle release be unnecessarily tricky to release . plus , if you want to let go of the handle and walk away to move a chair or something forget it . the sweeper will fall over . you have to put the handle in the upright position which will automatically shut off the rotate brush . then to resume vacuum you have to reach down to the base and flip the switch to carpet . basically every time you raise the handle and turn off the vacuum you have to reach down to the base housing and flip the switch to carpet . what a pain . my wife also complain about how hard it be to pull the sweeper back and forth as she sweep . it move forward easily because of the powerful motor but back and forth can be really tiring . also , the vacuum be extra wide . can make it difficult to get into narrow place and make it difficult to manuver . on the positive side , this vacuum be powerful . it will get the dirt and dust older vacuum may not get . base on my experience I would rather have a lighter , quieter , less powerful and more user friendly cleaner than this hunk . what ever you do , try out this vacuum before you buy it to see if you can tolerate the poor engineering that go into this cleaner .