I recently saw one of these in action in the US and it looked good. My only reservation is that I think it is a cloud based service and these come and go. If they stopped trading and their site went down then you would probably be left with a useless box of electronics.
I am not sure what I would do though if I was on the golf course (as in their advertising) when the over/under temperature alarm wen off. Maybe in the instructions it recommends that you leave your partner at home to be able to react. The temperature graphing feature is great though.