Mine is totally screwed after the latest Ikea Firmware update.
I will have to reset the Gateway to fix it I guess, but in that operation I will reduce my number on devices from 28 to 4, just to keep track of what is ‘happening’.
The rest of the devices I will transfer to Conbee/deconz.
Pros
1 - Group actions operates all lights in perfect, instant synchronisation. (though http/REST API)
2 - Paired devices and setup can be backed up (and restored).
3 - Zigbee-net pairing remotes/groups with lights are done in the WEB app. No need to pair next to light.
4 - Ikea remote button events are catch-able for use in rules.
5 - No gateway connection issues.
6 - OH2 HUE binding interfaces easy to devices (but no native /groups control)
7 - OH2 deconz binding interfaces to sensors through Websocket. (No polling required)
Cons
1 - On 5 button remote, the < & > buttons does nothing, so the ‘manual backup’ cannot control color.
2 - Firmware updates are not transparent(, but possible)
I have also tried out the HUE bridge with Ikea lights and it works OK, but no pairing of remotes (other than direct remote-light for manual backup), and no possibility to back up paired devices.