Settings not being held is my biggest gripe with it now (since getting a Unifi to deal with wifi - and no, it wasnt a conflict with other wifi etc). I do use alternative DNS and port forward a few things, and soon as this thing reboots for any reason you can kiss the DNS settings goodbye, and sometimes port forwarding. 

Vodafone kept telling me noone else had these issues yet their own forums had people with the same issues :-p And still no new firmware to address the problem...  so Ill go for a different firmware that seems to work :)