Most tint, you can see inside if you put your face to the glass. I can't remember about limo tint and not sure if a cop shining his flashlight in can still see through. Curtains is a big giveaway that you're living inside. So is Reflectix if it's on all windows. I wonder if spray painting Reflectix black would be more stealth. This way, at least you can take it on and off to get a good view & sunshine. Also, you'd have the shiny side for the summer and the black side for winter if you're in colder states. I've tried a bunch of ways, including: curtains, cardboard, black poster boards, tint, rubber mats....and the most convenient and effective is the Reflectix because it's the easiest to take off and put on, by far.