seems like a nice device, just need more battery life, even at 15 minute check in intervals it still only last 1 month before you need to charge it. A device like this needs at least to be able to hold a one year charge. In my opinion people are lazy and will forget to charge the unit every month or few days.

The more times you have to charge it will mean the device will be less effective because it's not on your bike, car or whatever it is that you plan to track. This is because people will forget to put the tracker onto the object when they take if off to charge.