We've had this vacuum for 2 months now and are absolutely in love with it. My only complaint is that it is heavy to lug up and down the stairs but that one negative does not outweigh the positives. 
The suction power is amazing. We were absolutely stunned by the amount of dirt out old vacuum left. 
It has a light at the end so you can see what you're doing or what you vacuuming. 
The clever liftaway portion is very helpful when cleaning the stairs. 
All in all it's a great investment and I highly recommend.