I used the screen protector that Home Tester Club allowed me to try on my ereader. It was very easy to apply. I had no problems with the application. The protector was very clear, so viewing was good. The reservation I have is that I'm not sure if the protector would hold up so well for things that can possibly happen. I honestly would not recommend this product for your high end products. I would however recommend this for items that you use for the most part in your home. Such as an ereader. I wouldn't feel comfortable using this protector on devices that travel with you regularly. It has its pros and cons. I would say try it for yourself and see.
I found the 2 pack Universal Plastic Screen Protector extremely easy to put on my tablet. I was also able to put one on my phone. The perforated lines were easy to fix on my devices. I had no problem seeing them, in fact I actually was able to see my screens easier.