Using ArtNet with the NETcon 8-3 has been unreliable. Frequently the node lags and the DMX output freezes for about a second, and then resumes working normally again. When this happens, it happens approx every 10 seconds. Sometimes it doesn't happen, and sometimes restarting the node fixes the issue. There seems to be some network issues in the device when using ArtNet specifically.
Switching to sACN (which is not advertised, but works with the node), works much better. Not a single freeze has happened for me on sACN.
For the price it's okay. Apart from the ArtNet freezes, the device has worked fine.