I didn’t look at any of the reviews for this product before already buying it and getting ready to download the accompanying app. As soon as I did though, I figured this was about to be a waste of time (only paid $1 with free shipping, thus, not a waste of money as well). Still, out of curiosity, I continued on. As Kindelf downloaded, I fiddled with the actual ‘tag’. Seeing as nothing seemed to happen when I pressed the only button on the tag itself, I was hoping it was just a dead battery. I was happy to see my only problem was not removing the little plastic strip that keeps the battery fresh. After doing so, the tag beeped and it’s light came on. Next, I opened Kindelf and was even more shocked when it did exactly what it was supposed to! I have only had the product for 2 days now, so I can’t speak to battery life or overall reliability. But I also don’t have anything bad to say either. Again, I paid $1 for the thing so I’m not going to be too upset if it does end up dying in a week. However, from what I’ve seen so far, it’s earned the 5 star rating I’m giving.