Excellent company for products and communication with great simple fitting video. The opal window film was so easy to fit as you can just slide it into place with a spray of water and a drop of washing up liquid. Because there's no adhesive you can easily remove - e.g. if you notice a speck after fitting it, wipe and put back on. It does the job and stays firmly in place. I put it on a double glazed upvc window and as the black rubber seal us quite old, specks of the seal floated up behind the film when I fitted it the first time, so I put it back on successfully by leaving a small gap between the seal and the film.