Product review (4 stars): Works Well
The sensors seem to work well.  I didn't really need three so had to get creative... I keep one in a freezer in my basement and one on my porch outside.  The third goes wherever I feel like monitoring at the moment.  It's nice to be able to setup alerts, currently I have one to notify me if the freezer gets over 20 degrees.  The only reason I didn't give it 5 stars is that the base station must  be plugged into the home network/router it does not connect via WiFi - so I couldn't put it someplace more discreet.  The sensors on the other hand do communicate wirelessly to the base flawlessly -- even the one in the basement freezer.  Now I'm wishing I could add more sensors to this base (I read somewhere it can only take 3) so I could put one in my main fridge/freezer.