Our Shark® Wandvac® Cordless Self-Empty System + HEPA!  is a great vacuum!  It' lightweight yet very powerful.  The self cleaning brush roll is absolutely genius!  Nothing gets tangled around it.  This vacuum self empties when it charges.  It's so convenient and easy to empty with no clouds of dust.  This vacuum works on carpet, hard floors and is light weight and portable enough for stairs and hard to reach places.