I have used this product before so was happy to order more. I use it to block the sun from coming into my windows so much and causing the a/c to work harder, thus causing higher electric bills. I've only had it up about a week, but when I used it before my electric bill dropped by approximately 25% so I'm hoping for the same, if not close to the same results this time.
It took quite a bit of time and effort to apply, but I was able to do it by myself and it came out very nice looking.
I'm not worried about privacy because I have professionally installed film on the insides of my windows, and I applied this to the outside of them. Between the two films my bill should go down a lot, I hope.