Hello i have two devices of the said extender( one V6 and one V5). I also have 100mbps down and 10mpbs up from my router. When i connect the extenders to the router they only go up to 30~35mbps max and thats when i have the plugged in the wall directly next to the router. When i put the extenders to other rooms they usually reach 20-30mbps when they say they are capable of 150mbps. Also the connection is unstable for instance i watch a show for 20 mins and suddenly the speed is down to 10mbps, then when i speedtest they slowly but steady reach 20-30mbps and after that first speedtest they instantly jump to 20-30mbps to the other 2-3 speedtest i do before continuing with my show or my youtube video. Btw i did do firmware updates for both of them to the latest version