I got three of these, but have had a pretty poor experience. Two of the three have been replaced already, and now all three are going back again. They ‘brick’ themselves frequently – especially after a firmware update is forced on them. I’ve lost count of the number of helpful emails I’ve had with their support team in Australia, but as soon as I think I’ve got one working, it throws a wobbly. One just started randomly alarming whilst one of my boys was out riding with his pals – for example. Another won’t pair/setup at all. The third was working fine, until I had to update firmware and now it’s toast – can connect to it, but can’t arm it or track it.
If you do buy one, ideally get it from your LBS and keep the receipt.