If you're like me, you might be doubting whether this collar could possibly be worth $400, and does it work for all that? Well, my friends, I am here to tell you that it is worth. every. penny.I have a German Shorthair Pointer and in addition to wanting to be able to find him when he's working, I wanted him to be able to wander my fields without direct supervision and have the peace of mind that he wasn't going onto roads or other people's property (the neighbors are miles away, but as anyone with a GSP knows, huge distances are no deterrent for these mischievous dudes :).The battery life is great considering the complexity of this device, the range works exactly as advertised, and judging by my dog's rapid responses, the tones and shock deliveries really do work from *miles* away. I can also rest easy when out of range of cell service - everything works like a charm offline.This collar has made it so Jaeger can exercise and wander to his heart's content, and I can be in my house and not stress about what he's up to. Just brilliant. My only regret is not getting the collar sooner!A few notes -1. the "dog statuses" can be a little oversensitive; that is, I have found about 20%-30% of the alerts for 'pointing' and 'treed' have been inaccurate while directly observing Jeager. This is not a big problem, as I've learned to look for "clusters" of status alerts to let me know whether he's truly located something.2. As others have said, this is a sophisticated set-up but as long as you take the time to at least skim the manual, it's pretty easy to use. Don't be a moron like me and throw the manual aside at first because you resent getting snowed with papers every time you buy something.3. Be aware that the "geo-fence" feature cannot automatically shock or play a tone when your dog exits; however, you get alerts letting you know the dog has left. This has been perfect for me. I recommend taking your dog for a walk around the perimeters of your geo-fence and using the tone to teach them where the new boundaries are. After that, I just keep my phone handy and get a push notification if he breaks the boundary (which almost never happens now!!).