I really like this vacuum so far.  I had a Hoover Wind tunnel before that was much heavier.  This is far easier on the stairs.  The Navigator also is better on bare floors due to the brush on/off switch.  
The only feature I will miss from the Hoover is the retractable cord.  The Navigator's cord doesn't retract.  That being said, the Hoover's retraction feature is one of the things that broke - it would let out the whole cord after a while. So I'm enjoying the Navigator's nice long cord!