I've been using another brand for 4 years and only recently it has becoming unstable.  I suppose that is normal wear down and so I was trying invest 3 times more for a Cisco as the shop said it is the "choice of stable", hopefully it can last for eve...

I have exactly the same problem about every 2 weeks.  Wifi just come down from 50MB to 3MB with no clue.  I hardboot the router and problem could be resolved. Another even more annoying problem is that the wired network sometimes just simply failed....