The dual modem-router is very easy to set up with xfinity and I have not had any speed or connection issues up until recently. I was having problems with connection after 6 months. Troubleshooting guides were not much help. I ended up replacing a splitter coax connector with a single connector and have not had issues. Fingers crossed the problem is resolved. Aside from that, there have not been any other issues and wifi speed is good.
I got this to replace the modem/router I was renting from my cable provider. I was having problems with things buffering due to the amount of devices that I have connected at my house. Since I’ve gotten this router out buffering problems are gone.