Very popular in the UK already, and by all accounts a great bulb. ST has an official zigbee RGBW devicetype in progress or just released. There are also custom devicetypes for this bulb.
The one in this thread adds several enhanced features. They may work out of the box or may need a firmware update using the Lightify gateway. (There’s also a non-enhanced version of this in the master branch on Git that works 100% out of the box for the UK version of this bulb.)