Crazy with this good quality router, sufficient performance for my broadband and above all SQM (Smart Queue Management) for real-time traffic prioritization, and almost eliminating Buffer Bloat, which proved to be my problem. Clearly, LAN and wifi must work, but in my case and certainly many others, the weak critical link is the router, especially if you use almost all capacity so it becomes a matter of prioritizing traffic. Selected it after a full day of research and forum help. Finished product with low price and low power consumption from famous and well-known manufacturers instead of testing me with OpenWRT custom firmware such as Linksys WRT1200AC that may be interesting for some.
Comhem has 100/10 broadband, 3 floors of concrete in the joists and walls (cable modem connected to the basement corner), 3 young people who play online from PC and console and watch Youtube on computers and phones at the same time nonstop, I run big downloads and stream 4K locally and online to various streamers, 5 Google Home Minis are connected to Chromecast Audio in active speakers and often work at home with Skype meetings. Everyone experienced dissatisfaction in the form of giggling on the grid with ping spikes, sometimes buffering media recording / long start time for media playback, hacking audio / video in Skype meetings, etc. As I suppose it looks in many families today simply ...
Attempted to cope with various steps. Each step made the situation a bit better but never quite good until now.
Step 0: Running Comhem's modem / router / wifi combo with unpleasant results.
Step 1: Disable wifi and connect your own wifi access point in the upstairs staircase (Ubiquity AP AC Pro) - good wifi coverage upstairs and ok coverage on the mid level, less good coverage on the basement. Tried to turn on the wifi in the modem and roama, ok but strange. Overall, it's rumored that it sucks to play via wifi.
Step 2: Switch AP AC Pro to TP-LINK Deco M5 mesh wifi. Better / ok / good coverage throughout the house (use only 2/3 in the package). Tried both wifi and cable backhaul with relatively small difference.
Step 3: changed the modem to brewed mode and used tp-link deco as a router on baseline, specified games and streaming as a prio in QoS Config, used cable to backhaul, and connected an unmanaged medium-stream switch and one upstairs (3 gaming PCs, 3 game consoles). Coupled all that went with cable, bandwidth / throughput increased and ping spikes and teams decreased significantly but occasionally experienced all problems in the form of ping rising from about 55ms up to 2500ms and media playback chopped and buffed (type 3-4 times per Evening).
After much research and an eye-opening video that described my experience https://youtu.be/o-g2P3R84dw (taught me the concept of Buffer Bloat) I purchased this magic router.
Upgraded FW to 1.10.6, ran wizard 2 min and configured SQM under QoS. I have seen different numbers, but after testing me, Config is 112 Mbit / s down and 12 MBit / s up (many have said that you should enter numbers about 10% under one broadband subscription, which in my case is 100/10, test yourself with dslreports / speedtest). Also, switch my Netgear GS108 switches to Ubiquity managed switches but it's probably really overkill. Also changed the config on tp-link deco from router to wifi AP. All very satisfied. No fuss and I notice a big difference in how fast the media starts, scrobble without buffering. Ping in the games has gone down and lies very steadily without spikes of about 35ms (20% improvement, not perfect but good enough, it seems like the noise has ceased).
A little reasoning before step 4:
An ER-X as a router (today has better performance with SQM than a USG and is so cheap that I can switch to a newer model of USGn when it comes), chose 2 UniFi Switch 8-60W that works well, is fairly future-proof , allows me to take my AP AC Pro again and run the controller (I simply understand that the ER-Xen is not available until further notice but must buy at least one AP). Then I can also build on cameras and other POE equipment.
Landed in the end, this equipment works well for my 100/10 docsis broadband and a bit more, and provides good speed on the LAN. No whining so long from the kids, hope it's up to you