It's success relies on it's penetration in the market. There are numerous devices like these, none of them with great penetration and no standardisation - so I am not too confident this will work. By the way the reviews for this particular product on amazon.com are pretty damming.
Spot on. I saw this on another website and liked the sound of it so did some investigation. On the Trakr website there is a zoomable map that shows "active" gps devices that you could piggyback on. What that means is that if your bike is within range of one of these devices then you can find it. I think the range is about 100ft?
Anyway, I looked at my town of Glossop for example. There were three active units. I reckon you would need fifty, a hundred active units in Glossop to be reasonably confident of tracking your nicked bike.
So the market penetration is a million miles away from where it needs to be to be a useful product. Even in a city like Manchester there are massive holes in coverage
Useful for finding your keys in the house. That's about it