If possible I would rate 4.5 stars - 
Overall I'm very happy with this vacuum in the month or so that I've had it and I can't believe how much it pulls up every week.
However the 3 small things that I wish would be better are:
1) The wheels are already squeaking sometimes,
2) When I empty the canister, I have to make sure to cover the hole where the canister connects with the tube in the vacuum because otherwise the dust and dirt can escape out the side, instead of just out of the top of the canister where everything is supposed to go out into the trash, and,
3) After using an attachment, when I remove it to reconnect the vacuum to the stick there is always dust/dirt that falls out when I pull the attachment off, so I have to be mindful of where I remove the attachments so I can make sure it's a place I can easily vacuum up what will fall out.