When I use deco WiFi the speed is so slow. I checked all line is ok. If I don't use deco the speed is 500Mbps. But it is 60Mbps if I use deco. 
 

so I checked WiFi interference. WiFi channel was crashing so badly. So I use WiFi optimization function in deco app. But the channel was changed to more crowded channel. So now it become even worse. The optimization is terrible and horrible. 
 

I ask tech team to support manually changing option. But thay said thay don't care. I don't understand what "don't care" mean? so now I am thinking of buying Asus. 

if you care about budget don't try deco. 
 

x50