This stuff is fantastic. I used this on a bathroom window after trying the privacy cling. This spray works far better. Application will need a well ventilated area and a mask, but the instructions are simple and it was easy to apply. Curing time is a couple of hours so if using in a high humidity area try and keep it ventilated till cured. The light level has been minimally effect, less so than the privacy cling. Privacy with this continues at night as even with a light on you cannot see into the house. So far there is no wear/scratch and I have washed this window using soap and water without lifting issues.
Overall extremely happy with this purchase and would definitely buy again if needed.