The chipolo work very well. It work either on Apple network or on Google network. It does not work on both at the same time, which I thought it would. I am a bit disappointed. Nevertheless, it is easy to configure and it works well up to now (3 weeks). Mine will be used to track shipment.
They work ok singly but when you have multiples all connected to the same Google account they drop off and have to be reset a lot. The bluetooth connections for Find are flaky too, somedays one will show, somedays another, never all.
So far, so good. They work as expected. I would have given a 5 star rating if I didn't have issues installing them in the app; it took me several tries to do so.