Logitech and Cannon seemed to both share dodgy wifi units between about 2008 and 2015. It was far from all units but there was a heap of them that would work one day then stop working the next, only to come back the day after. But the main faults I found with Logitech in the years before I stopped selling them was circuitry, cold joints, bad joints, shit soldering in general, bad connectors. I've still got a wireless Logitech keyboard and mouse from about the same year (2003) and they are working but pretty much everything else Logitech I've had is gone, even the surround speakers I've got have never worked like they should, but I'm too lazy to change them. For basic systems I can't really fault the cheap as fuck Microsoft wired keyboards, I pay $3 each for them and they seem to go forever.