Hey hope you don't mind if I chime in on this one. This seems like a cheap solution but it lacks the real GPS tracking we want for our important treasured instruments!
I deal with GPS tracking through work. This device is a "kind of" GPS tracker but does not act like say, a Car or Truck GPS tracking device.
The little button in the video is connected to your phone via Bluetooth or even wifi. The tracking starts when the phone and tracker are separated and go out of range. The phone remembers this location and can direct you back to it. The buzzing of your phone also works in this way. If your phone was in your car and your were at work some distance away, the buzzing would not work because the proximity distance is too great. (going back and re-reading the initial post on the thread this is exactly how the Tile works)
This device is more like if you lose something it will tell where you lost it, but not the actual location of the item if it has been moved or...as we want it use it here in this thread stolen...UNLESS (as they craftily point out) another tracker user with the same app as you comes close to the tracker device.
The device is also battery powered, and all the devices I've seen like this do not have a replaceable battery. You just have to buy another device.
So as a global personal item (or person, or car) location device this does not work well. If you walked out of your car and forgot your keys, it'll work great.
Or if you forget your Alembic instrument often, this would work well also. (gets to the gig, "Where's my bass?", check tracker, "Damn left it at home again!")
I'm not saying it's bad or good, just that the marketing sways one to believe it's more than it is.
This device will work, but it has really crappy battery life once it starts telling you where it is and you need to purchase your own SIM card:
https://www.amazon.com/ABLEGRID%C2%AE-RealTime-Tracker-Vehicle-Tracking/dp/B01535CSCE/ref=sr_1_5?ie=UTF8&qid=1477925061&sr=8-5&keywords=gps+trackerThis device is super and has a long battery life, and will give you a trail of where it's been and currently is! Also includes the SIM card and service. Had very good experience with this one:
http://www.brickhousesecurity.com/product/spark+nano+gps+tracker+for+business.do?sortby=bestSellers&from=fnThe above company also has other GPS devices that work quite well.
Happy Halloween!