Excellent customer service, very helpful advice and explanation. I researched several options before choosing PetTracer and I am glad I did. Our boy disappears regularly for days at a time and now we know his territory and that he is mostly over at the neighbours farm. It did take me a while to fully understand the way the collar works and why/how Diggle could be home and the last gps signal was still showing him as away - which is until the next communication with the collar. It didn't concern Diggle to get used to wearing the collar even as a semi-feral. I will say the catch is not a safety catch as I cannot pull it open without unclasping, so I fit it quite loose and we did lose it once, but of course were able to go mobile with the base station and find the collar in a field of peas which was a good test. The metal keeper on the fabric part of the collar was too big and useless so I removed it and stitched the spare end down which worked well. The battery lasts a good week on fast and the reminder by email that the battery is getting low is very useful. An alert of some kind when the collar/your cat comes back into range would give greater peace of mind I think. Overall I am very pleased with the PetTracer.