I went with a mesh network a while ago and found the Deco to work very well. It allows you to create a separate "guest" network, which in my case is a dedicated 2.4Ghz smart home, which is awesome. There are 65 devices connected across the two networks. Coverage is fantastic. Speeds are great. Love it. There are ton of options, but all laid out very logically and easy to access. Built-in antivirus, QoS options that allow you to prioritize traffic, reporting tools, and more.
The only downside, the model I have does not have USB connection. Newer version may have them, not sure. I have not tried other mesh networks but I'm sure they all offer similar benefits.
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If you have a device that can only connect to 2.4ghz WiFi it’s a pain because the Eero creates a single SSID that won’t let you choose between 5 and 2.4. I’m no expert on this stuff. But basically you have to call eero tech support to have them temporarily hide the 5ghz network in order to connect certain devices, Wemo outlets and Nest Protect smoke alarm for example.
This is exactly why I chose Deco. It allows you to run two separate networks AND it gives you the option to turn on each channel frequency on or off, so you can have a main network that runs both and a dedicated network for 2.4Ghz only. It's absolutely brilliant.