This little machine packs a HUGE punch.  I still cannot believe the amount of dirt this vacuum collected. It was impressive to say the least. I was surprised at how quiet it is for a vacuum. 
If I could change anything about it, I would have the rubber bumper strip go all the way around the entire unit.  This will ensure that furniture does not get scratched when the unit comes in contact with an object ( and then spins itself around). 
Overall, I am overly impressed with how well it cleans the floors.  I really didn’t expect it to do well on hardwood floors but it DID.