I wouldn't install a TP-Link at home but because I'm a nerd and most computers are wired, and also have a Ubiquiti Unifi network with a couple of access points.

But I've installed the TP-Link Deco M4 at parent's and brother's houses where they consistently had internet and wifi issues. They're now all stoked and their networks are reliable. For your use, it sounds like the M5 should be more than enough, the difference between good and bad coverage is much bigger than a few more mbps allowance.