Product review (4 stars): Works well, easy to install, not 100% reliable, alerts are too slow for anything important
Installed the base station and three sensors in a house.  Installation and registration was easy, just need to do it in the right order.  Installed the app for iPhone and that worked off the same account from registration.  The sensors work well but lose connection roughly once a week.  Signal strength is above 90% according to the app but sensors will not report for hours.  Sensors are between 15 to 30ft away and on different floors, but no correlation to the failures.

The alerts are slow, I'll get a text alert at 8:30am for an event that happened at 6:30am according to the text.  Charts in the app and online work but the x-axis is a pretty useless serious of random timestamps for a chart that spans 4-5 days.  Touching the charts will highlight datapoints with temp and time, but no date.  No ability to zoom or scroll through time.  You can download a CSV file of the data via the website, but when I tried to download the file it occasionally gave me an empty CSV file with just a single row of headers.  When it works it appears to have all the data going back months.

All in all useful product, but if you need something guaranteed reliable you might want to look elsewhere.