Product review (4 stars): Additional Charges
Setup was pretty straight forward, so far it works fine. I was in for a surprise when I tried to add an additional sensor and found out that it required an additional subscription to an enhanced service plan, so more money.  It would be nice if that was clear at the time of purchase.  Love the product and the idea of being able to monitor on the internet, just as much as the cost is to have all the additional charges.