Brilliant idea!!
My least favorite part is that they are just black and white - no Halloween color or decor added. That being said this sign is brilliant and the black and white does stand out in the dark (with lighting of course)! Being able to flip it to indicate that we're out of candy was splendid! We did have to add additional weight to the bottoms of the signs as it was windy and they would randomly flip themselves. I learned this when I heard a passerby say, "why does that the sign say 'trick OF treat'?".  Unfortunately I bought the sign after all of the decorations were up and failed to get a picture of it - next year! It is good quality and serves a great purpose.
Rating: 4 stars