A house by mine uses these in the front yard for Christmas time. The people point them into their trees. The effect is really cool, especially when the wind blows and the trees move. All the laser dots make the tree look like it is shimmering. The price, in my opinion, is not worth what you get though. It is a static effect, so it is only so cool for so long. I personally do not have any, but have looked into the effect for my light show. I would probably mess around with the eBay option before the sparkle magic option due to the price. For the price of the sparkle laser, you could get a small dmx laser in which you could control the colors and such, if you wanted to.