I setup my guest network as a learning experience. My guests are trustworthy so that was not the concern or issue. This was an experiment (THAT FAILED).
Several hours after I created the guest network, I was UNABLE to access my main network from my iPhone. And, I was completely locked out of my router. YIKES. Fortunately, I had a backup file (DO YOU HAVE A BACKUP?), so I did a router factory reset, reloaded the backup file and was back in operation (everything worked). My assumption is the LUXUL support person forget some setting or changed something he was not supposed to. Obviously, the setup has many different settings on many different screens. This was very frustrating.
My 5-year-old LUXUL XWR3150 router settings are very complicated, there is no documentation and, obviously, the LUXUL Customer Support people do not have all the answers. Nothing is easy to deal with on my router. AND, in addition, the LUXUL Easy Start App would NOT connect to my router (another issue.)
The newer routers are much more user-friendly. YES, I have given up on creating a guest network. Is it time for a new router, maybe?