Bests & Worsts Reviews from Amazon

All 6 receivers require button cell batteries that need to be replaced every 6 months (according to the instructions). I wouldn't have bought this if I had known that. To add to the problem, the included double sided stickers that attach the flat receivers to devices block the battery compartment. You'll need to undo the stickers and also use a screw driver to get at the batteries. The compartments that make for "easy to replace" batteries are only the key ring receivers, not the flat receivers. One other quibble is that there's no place to label the devices on the transmitter base, so you have to remember what color = what object. If you could remember things like that then you wouldn't be buying this device in the first place. Upshot is I don't recommend the product. It's a shame, as otherwise I like the simplicity and the build quality appears to be OK (on the first day of use- I'll update if they break). I also appreciate that they included an extra battery set in the box. If I had only bought the key ring receivers and not the flat receivers I would have been happier with the design. End note: Customer support emailed me about this review and acknowledged the design flaw, which is a good sign. I'm bumping the review up by one star because they seem to care and because it may be that all key finders have battery life problems, in which case it wouldn't be fair for me to drag down this one down relative to the others. Update after a few months: The good side is that this product has helped us find our stuff a few times and nothing has broken. The sound level and range is good for walking around the house looking for your stuff, but don't mistake this product for a long range pet finder. After 6 months: The bad side is that the batteries are in fact wearing out, and the flat receivers are failing like I feared they would. The receivers start beeping at random when they run low on batteries, often at traffic signals for some reason. When you replace the battery on the flat receivers they don't reattach to the sticker well enough to be useful. We ended up retiring the flat receivers and now have to remove the gooey sticker stuff from our electronics. Dropping back to 2 stars because of that.