I'm using mine, H.,harder to see and operate than the old 220 but the tone/ shock is nice. Agravating to have to lock and unlock screen. I use the Google earth on my phone if needed. When I get home with my Lab she won't let me get her out of the box, snarls and snaps. Gonna have to put a leash on her when we head for home so I can pull her out. Last two trips have just had to leave the door open until she decides to come out. Never seen that before.