Marcia C.
I have to say excellent and here is why:
I have to say excellent. Recently our dog escaped and was gone for 20 minutes. I immediately got out the phone and tracked her through the Whistle App. It gave me route and that she was 800f from where I was standing. I located her and brought her home. Then we had to find out how she got out. I pulled up the escape route and enabled the location on my phone as I walked the fence line. I found the area and noticed dog hair at the bottom of the fence post, There is a gap about 10 inches between the fence post and where the gate is hung. With the history of her route and enabling the location on my phone, I was able to pinpoint the exact location of the escape. Thank you Whistle.