I bought this vacuum 11 years ago and it is still going strong.  I upgraded it with a hepa filter since I had pets.  At the time they didn't make the mighty might for pets but that is the only real difference between the two now.  I also bought an extra head with an agitator for thicker carpet.  This little light weight vacuum is a beast, it handles every job I have thrown at it and doesn't smell bad, leave dirt or show any signs of wear.  The filters are a little hard to find in stores but Amazon does sell them.