Well it has been over 24 hours and the router hasnt completely crashed out like the XR did, so at least so far things are looking promising. The speeds and pings achieved are also significantly better, makes the XR look like a joke despite under normal pricing it would be a lot more expensive at RRP than the R3. I really like the new look and how everything works in here.
Edit: One feature I would like to see, that I can't currently find the option for is the option to save a backup of configuration and the ability to then later restore it, especially as you guys reccomend to factory reset after a firmware update, thats a lot of man hours to have to spend to set and tweak everything again.