Look carefully at the product number on your order. There is a reflective and anti-reflective version of this product. You will probably want the anti-reflective version (Model # SP-AGF-APL-ID-2) because it reduces the annoying glare from ceiling lights while you work. The only benefit of the reflective version is that, as with the iPad screen itself, you can see who is behind you / looking over your shoulder in the screen's reflection, and for some people, that is important. So double check the product numbers carefully and purchase the version that best suits your needs.
Before applying this product, I cleaned the iPad screen thoroughly but gently with disposable lens wipes made for eyeglasses (Zeiss and Bausch and Lomb brands). I found that once the protective film is removed, the product must be applied quickly, otherwise dust from the air will start sticking to the film. Even the tiniest piece of dust between the film and the screen will ruin the screen's appearance. It takes some skill to get the film placed correctly. They give you 2 films--2 tries to get it right.
The product functions very well and I would highly recommend it.