Normally 0 points

1. Grease and dirt-repellent
2. No impairment of screen display and operation
3. Perfect fit - especially for your Nokia Lumia 830 gefertig

By order to review and install on my Nokia 830:

to 1. Probably not. Dirt / dust and grease will continue to feel attracted
to 2. Well, yeah ... film is much too narrow. Does not cover the entire screen, so you have eg. A nice edge to the left and right of the display, which acts immensely disturbing. Also it remains to the new edges of the screen / foil in the middle when operating the displays always nice hanging out with his finger, which has proven to be extremely annoying and distracting out. If you like "sore" finger, only to: Order!
to 3. Just a bad joke! As mentioned, the film is much too small. However, Left, Right, Up, Down ... highlight: It is missing at all ends and corners The microphone is only once pasted beautiful! Bonds they remain high ... That's right! Ear to God .... how stupid!

That this also anyone noticed by the producers ... but wait only once beautiful cobble something on the packaging and bring to the customer. But these are clearly punished!

Seriously: you Save your money.