I've been using the Trackimo one for about 2 months now it is amazing!!! I use it to track my car sometimes to remember where I park it and more to use to track family members it works very well and it really accurate it works down to 10 ft of where the device is. I would highly recommend this to anybody. I did a lot of research on how the Trackimo works. It does give me a lot of information and this is what I wanted. Now I can track my important things anywhere not just within 100 ft.