Amazing collar. I watched this company grow with huge levels of excitement that this collar would work in rural area of Devon that has no mobile signal...... boy it does. You have to understand the collar is not necessarily a live location but it maps where you cat goes and then uses radio signal and GPS. That said on the times our cat has lost his collar I have managed to find it - from 30ft up in a hay barn , 10ft up a tree, in a bramble hedge. The battery life is excellent. We added a little beeper onto the collar to make it easier to find where it is plotting on the map. I certainly feel much happier with the collar on and being able to see where he is likely to be and his normal routes. We also have the external aerial on the roof which picks him up a good 3/4 mile away through woodland. I cannot recommend this collar enough. Alan and his team are awesome and customer service is amazing.