Pros:
Picks up TONS of fine dirt! 
The small powerhead allows to get in small corners for easy maneuvering. 
I like that the top part becomes a handvac for getting the nooks and crannies rather than needing another unit.
I love that I don't have to switch the brush rolls for different floor surfaces. I can change that with a click of a button.
Overall I am happy with this purchase.
Cons:
Top heavy, will not stand on its own. However, I understand that this is the drawback to having the access to using the handvac feature so it's a one or the other situation, can't have both.
Also with the power head being smaller, its gets the small corners but it does also mean that you will make more passes to cover large areas.