I have the Zigbee and non-Zigbee versions of these. They both work well, and battery life is at least 6 months, which isn't bad. They have been reliable, but range of the Zigbee models is quite short. This isn't unusual for battery Zigbee devices as they usually need a line-powered Zigbee device nearby to reliably repeat the signal.

There are a few cons, however. First, you have to press a key for them to light up, and if you press the wrong first key at night, you need to start again. Second, this lock uses "Smartkey" technology which has some vulnerabilities which makes this lock less secure than it should be. Third. the instructions, especially the Zigbee instructions are very poor. Finally, if this lock could store more than 2 codes, that would be great.