I bought it as a second (auxiliary) one because we have a vertical blind on our balcony door, which was broken and neither of our two aluminum workers on the island had time to come and fix it during the entire summer season. In the first week, half of it fell down because the adhesive scratches it has don't stick well to the fabric. I fixed them with a stapler and it stabilized somewhat. After about a month of use, it tore at some of the points with the scratches and I had to constantly make adjustments to fix it. The plastic parts that hold the magnets often come undone and/or rotate, especially at the point where you open it. Overall, you have to constantly deal with it until it drives you crazy and you throw it away. The only good thing I can say if you don't use it much is its weave, which is very dense and indeed doesn't let anything pass through. I should note that it doesn't catch the wind where I put it, so I can't say it was particularly bothered to the point of throwing it away within two months.