@Ador 

Hi,  I have the E4 unis as I was using poweline adapters and geting speeds of only 15-20Mbps.

The E4 was easy to set up and was getting speeds of 40-50 over most of my house with speeds of 85-90 near the main unit.

I set the E4 up as an access point and when I connect directly to my router I am getting speeds of 250-300.

I got the m5 unit today and started again with the M6 as the main unit.

I am now geting speeds of between 150-200 over most of my house with over 400 from the main unit.

A massive improvement, so worth doing.

Cheers,

Peter