Got our tracker for our GSP and was surprised how heavy it was. That said, it does not seem to disturb our dog when out. I find the orange rubber fastener that fixes onto the collar a bit fidgety to secure and worry a bit about the longevity of this part. So far, so good though. As far as the tracking on the app it’s pretty good with a delay of about 30secs the max time I’ve had to wait for the tracker to match the dog.
Overall I’d recommend it.