UK based so I followed the appropriate link, also subscribed to the beta group via the e-mail link. Had both skills visible and enabled in Alexa.
So far so good. I was on an old firmware, yet the devices became visible in Alexa (and they responded to voice commands).
So then I ungraded the firmware to the latest version (1.7.2608), which went fine. Again, so far so good.
Next removed all devices in Alexa and re-discovered and all the light and heating devices have been discovered. Window blinds, have not been discovered (they hadn't either under the earlier step). Not the end of the world for me as they are all under PLEG timing controls which generally don't require manual intervention from me.
Testing so far has been positive, some delay lag in response to voice commands, but all at least responding.