I already have one Shark Pet vacuum, but it is an electrical cord type and is about 5 years old.  It still works really well, but I thought that maybe a cordless would save me some time and the new vacuum had a self-cleaning brushroll. That is important because I have two Huskies, who shed all year around. 
     Well, I received my new vacuum in a couple of days and charged it up.  It and me went through a 1702 square foot house in about 30 minutes.  It is not only lighter than my older Shark, but has all of the moves that the older Shark has with none of the problems. I love it!  Every home should have one of these.  I use it every day.  My older Shark is now a back-up.