Recently installed 4 x T3VZ and 2 x ZRP6 into two luxury highrise units (condos) for a client who uses these two units for his staff and his family. Wanted a simple remote system that would be easy for lots of different people to use. Unfortunately the Zigbee turned out to be a problem with the wake-up issues. If the client presses a button and nothing happens, then the remote doesn't work. Simple as that. After a few weeks of this and different people coming and going, I have changed the remote to 433 comms versions and the problem has gone away. RTI here in Australia happily swapped the T3VZ's to T3V's, thankfully. I think Zigbee offers a lot of potential, but until this problem is fixed, the Zigbee product is only going to lead to problems for integrators.