@lainelaz This will work (in fact, that is what I have with my Deco mesh), but you must configure Deco mesh to run in Access Point mode. Check these two TP-Link FAQ articles: 1. General questions...

@Johnbous I can't tell if X60 will be better with WiFi, but after you deployed Deco units you can find that info in Deco app. Open Satellite Deco info page in Deco app and you will see similar to...

@Johnbous It is possible that WiFi link between Satellite X60 and Main X60 will be weak. That depends on distance between them, obstacles, etc. If Satellite Deco can't have good WiFi connection to...

@Johnbous In your current setup with powerline adapters, what is the speed you are getting on PC connected to adapter, when running speed test? There may be other option you haven't considered, but I...

@Pairis You will need to look at Show List screen in Deco app to find how Decos connect: and after that open page for specific Satellite Deco to verify its connection and where it is connected:...

@nickarsow Actually, one more thing: anything special or different about SSIDs for Main and Guest? Non-English symbols for Main but not for Guest? How about swapping Main and Guest SSID names in Deco...