@btv94 

I've had three M5's on the same table and those worked fine.

The Deco units have Adaptive Path Selection where the data can automatically circumvent the congested channel when transmitted between multiple Deco.

For example, when Deco1 transmits data to Deco2 and it finds that the 2.4GHz is interfered or congested the Deco will automatically choose the relative idle 5GHz band to transmit the data to improve the overall transmission efficiency. If two Deco are directly connected with the cable (i.e. Deco work in AP Mode), the data will be transmitted via the Ethernet cable.

@Tony 

Unlike netgear orbi AC. Minimum distance is 30ft if not, the wifi strength needs to be reduce to avoid interference. 

Thank you for the info.