Seems to be working well on my BT hub5 which I'm using on my VDSL connection, not noticed any issues so far.
I've got it to boot reliably without encountering the really annoying BT hub5 boot loop issue by building it from source with most packages and modules built using the 'm' option so that they are omitted from the sysupgrade bin file and installing them using opkg after first boot. I've rebooted the 2 routers its installed on multiple times and they appeared to boot successfully every time, or at least there was no obvious sign of a delay.
I used the guide here to get a matching kernel vermagic so I can still use the install feeds
I also tried including some of the omitted packages such as for wireless support, but still without luci, but that bootlooped for ages.