I am quite disappointed by this webcam cover. While it is indeed thin, it has several critical flaws that detract from its usability.
1. The adhesive is not very good. Despite having 3M emblazoned on the peel-off sticker, the adhesive does not stick well to glass devices. While it has yet to fall off, the cover routinely drifts away from the actual webcam and covers the light sensors.
2. The webcam door has no way of locking shut, and slides open when your laptop jostles around in your bag. You need to make sure that you double-check every time you look at your laptop.