HI I've been using the Xr500 for a couple of years without to many issues.
I upgraded to the Netduma r3 about 3 months ago, and have had nothing but issues throughout my entire network.
I run LInux machines, which seem to loose their DNS settings when connected to the r3, even when they are pointed directly to googles DNS servers.
Streaming on Youtube and Netfix is constantly buffering when connected to the r3, along with long pauses when browsing the web.
Its got so bad recently that I have swapped back to the xr500, as soon as the hardware is replaced all the above issues disappear.
Both the Netgear Xr500 and the Netduma r3 are configured with the latest firmware and are setup using the same settings.
The ISP network speed is 900/900 mbps.
Any Idea why the r3 seems to have so many issues?