Delivery in 48h

I delivered in 48h after order 2 days in advance of the estimated delivery.
I have not yet started the change. In the package there is no manual, I hope it would not be too complicated.
Update 03/27/15: is change. The hardest thing is to remove the caps that hold the rubber. Otherwise it's quite easy to remove the old and replace new. For 15 minutes of tinkering, I saved about 30 euros on the pair of wiper blades. And in addition, a green gesture because I reused plastic-TRUSS part brooms instead of throwing them in a garbage can. For now it works well, to see in the coming months if it still holds the road.
The two negatives I see: no manual and the length of 2x700 mm are not enough to change the brushes 3 (behind the wiper).