I couldn't beat the price, though it may have been a closeout price, since this particular model wasn't sold on the Zagg website. I am reviewing a non-glass screen protector for an iPhone SE. I installed it myself with no problem at all (but see caution below). I did not remove the protective cover from my iPhone until ready to install, so there was no dust, but wiped it down anyway. Be sure to cover entire surface of phone with the adhesive.
When I was done, it appeared that part of the edge was not sticking. Knowing that was a complaint of others, I called the Zagg customer service in a panic. They offered a complaint number so that if it did not apply as expected, I could order a new one under the guarantee with no shipping costs, and they spent time on the phone answering this and other questions. Zagg customer service is amazing! In the end, once the protector had time to cure, all problems, including the edge, and some minor bubbles, were resolved or disappeared, and I am very happy with the result.
NOTE---nowhere does it say this, but when I told the customer service person I had read recommendations to leave the phone off for 6 hours, we said they recommend 24 hours! That's what I did. That means no heat to conflict with the curing process. I would recommend following this suggestion. At least, mine came out beautifully following that suggestion.