We were looking for a good tracker for our outdoor kitty and this one is great. It has both GPS and radio signal tracking, which was very important for us - I'm sure everyone who owns a smartphone knows that GPS is not always the most reliable, and the backup of the radio connection is great for peace of mind. We also very much appreciate that the tracker has a release clasp - important for any cat collar. We are lucky enough to never have had our cat get lost, but the tracker still gives us peace of mind - we can see where he goes, and know, for example, that he is nowhere near any busy roads and usually stays nearby. Even if he has been out for a couple of hours, a quick check on the tracker tells us he is nearby, so we don't have to worry. All in all a fantastic tracker, and also great customer service - if you need any help or advice. they are always there and quick to respond - would really recommend