@Handpol Let me see if I read your post correctly. You plan to buy 3-units mesh, and you will wire all three units with Ethernet cable. If this is the case, it is easy to give recommendation: You...

@Akhenaten House layout is only used as Deco units placement guide for house owner. Selecting specific house layout does not configure Deco mesh in any way. You should review the section of the...

@AlanInSitges If you want to try something, configure Deco to run in Access Point mode, to see if it changes anything. If not, or if you want to use parental controls, filtering, antivirus - just...

@Cliff.Liao >Need a reboot all DECOs feature instead of reboot one by one ! Check if you have option to "Reboot All" in Deco Web interface (could be firmware or model specific):

@andrenb Firmware 1.5 is already released for M9 in EU and NA, but not everyone can get it through Deco app yet. You can visit TP-Link Support Web site, find firmware for your hardware version of M9,...

@hoplawego You may wish to check what QoS parameter is set to in your Deco mesh, and increase it to unlock your new Internet speed. See Using QoS feature of Deco. I wish TP-Link documented that...