I like the app and it has some good features. I like that I can see all the iPhones/iPads Im tracking on the map at the same time. It works just like the developer says it does, and the tracking is accurate. Two problems I have with it. First, set up was a bit confusing. It worked best when you ask to track a device, and then from that device accept it. If you try to give permission to track from the device you want to track, it doesnt work. Once I got everything set up after three tries, it all worked fine. Secondly, tracking only works if you ping a device AND the person using that device accepts it. I would like to be able to track the device even if the notifications are ignored. I only hope that the app will be updated with the new iOS 4 to somehow take advantage of background processes to accomplish this. Overall its a great concept and a good implementation. Needs a few improvements for it to really shine.