I have had a few brands- never had an issue with the Tritronics

i'll be going to a GPS set - i can hear the bell for some distance still- but direction is the big issue for me, if the bird is gone by the time I find the locating beeper it does not do me much good- the GPS would take me to the dog without the dump truck in reverse affect

I think for many of us- the GPS feature is the big and most usable new feature