@klapaucjusz1 We can exclude X68 from this list. It is same as X60, but has separate band for wireless backhaul. That provides benefit when most or all Satellite Deco are wirelessly connected. You...

@Gamesh If you like Deco M9 Plus, I would recommend to just buy more. TP-Link still sells them. It makes sense to expand coverage using same type of hardware. Also, there is firmware beta for M9 Plus...

@my2108 Wired Satellite Deco perform better than wireless. It is recommended to wire Satellite Deco if you can. In AP mode, you can wire them practically any way you want, to any available Ethernet...

@GeraldoCWB In all my tests with Deco M5 I never got WiFi speeds faster than 475Mbps. I ran very many tests, in almost ideal conditions. Which means, you are getting as much from Deco M5 as it is...

@Piers As an owner of multiple Deco M5s I can tell you that you have defective unit. Return it to seller. Buy M5 from different seller, if you can get working unit you won't be disappointed. Next...

@Achilleas Main Deco M5 can provide WiFi speeds of up to 500Mbps. Which means, if you ever decide to upgrade your Internet speed, you can go up to 500Mbps without need to replace Deco M5 hardware....