The accompanying installation manual with pictures (and describes quite straightforward), how best to proceed with the application of the film. I've just begun after cleaning the display with a microfibre cloth / lens cloth, exactly on the edge hang two cm with partially peeled carrier sheet above, then the carrier sheet away slowly downwards. Also, I am driven along with the wrapped credit card on top of the protective film, while I have the support sheet on slowly withdrawn downwards. What sounds somewhat awkward, took me no more than maybe 2 minutes.
For me, the film is sitting absolutely like a glove on the display, is therefore exactly fit at all edges and corners. At the corners I had to really "go into the corner" so a little more intense help out in order to fit the film precisely because the context of the Kindle Paperwhite is something sublime as the other Kindle models and the application of the film with a thicker tapering piece of cardboard converge here two countries to each other. In my case, the film is located now absolutely invisible fully on display. Limitations of the touch display (as you might fear Sometimes) are not occurred, it reacts just as quickly as before. Light is reflected as little as before (so there is here no negative changes) through the film.
Probably (at least I hope so, and shut it out of the protective film for the iPad), it takes many years before I ever need the second film. So you can safely give them away or try the second film without problems, equal only to order one if that is offered by the company (in this regard have not made me knowledgeable).
Conclusion: This is a tailor-made, cost-effective display protection film is easy to apply. In my experience with other Mumbi films you have here certainly a durable film that protects the display very definitely against dirt and scratches.