Internet - anyone getting anywhere near the speeds they are paying for?

I am to get 400mbps and have a Xfinity router-modem and find I have to reset it daily now. My speed before resetting it, is less than 100.

Hello @Reau482 Thank you for sharing your expereince on our Xfinity Forums. Not receiving the speeds expected will put a damper on anyone day. I'm sorry that you have this ongoing experience. We would love to help out and make sure that your services are working as intended for your home. With our Gigabit plan you should see a download of 1000 Mbps with an upload of 20 Mbps or close to these speeds with a hard-wired connection on a Cat5e or Cat6 ethernet cable. 

Do you have the slow speeds on multiple devices? It's possible that if you are a dual-band wireless network that a device is finding the 2.4 GHz network as the better connection, but with that comes slower speeds.