Hi. I recently got 1GB fibre to the premises service (yay). Until recently, I had a FTTC service (theoretically 76 Mbps service but in reality was getting ~ 30 Mbps) and my wifi network consisted of two Airport Extremes (6th gen) connected by 1GB Poweline adapters set to create networks with same name and passwords. Although we live in a 2 bedroom apartment the walls are very thick and just one Extreme wasn't providing coverage throughout. What I found out with the new 1GB service was that wifi speed using these Airport units was OK with my previous ISP speeds but not so with this new services; speeds over wifi were slow and patchy. Some areas I was getting 150 Mbps in others 20 or less. After some research I bought a pair of Netgear Orbi RBR50 units. Set up was OK, a little fiddly but manageable. Once the link between the units was established, I was getting good wifi coverage and speeds. I can now achieve 400 Mbps when in the same area as either the base unit or the satellite (compared to ~ 150 with Extremes) and in the worst corner of the flat now achieving 50 Mbps (was getting ~ 15 with Airport Extremes). What I can not figure out is this: I am seeing a significant drop in speed between when I connect the ISP cable directly in my Mac (which I can; no router is needed to connect to service) versus going through the Orbi (or ISP provided router): Test 1: Ethernet Cat6 from wall to laptop - no routers: download speed ~800, Upload speed ~880 Test 2: Ethernet Cat6 from wall to ISP router -> Cat6 from ISP router to laptop: download speed ~500, Upload speed ~700 Test 3: Ethernet Cat6 from wall to ISP router -> Cat6 from ISP router to Orbi router -> Cat6 from Orbi to laptop: download speed ~500, Upload speed ~700 Test 4: Ethernet Cat6 from wall to Orbi router -> Cat6 from Orbi to laptop: download speed ~500, Upload speed ~700 I have spoken to both ISP and Orbi; no answers (Orbi support recommended changing MTU setting from 1500 to 1450. This has not made an impact). Only reason to use the ISP router (not broadcasting wifi) in addition to Orbi is that I get VOIP telephone service which plugs into ISP router. Any insight as to why there would be such a drop in speed between going via either router rather than direct (all with Ethernet Cat6 cables)? I know "just" 500 Mbps is blazing fast and many would be very happy with that but I am paying for 1GB and getting half and I need to figure out why If you're thinking about the Orbi router, they are expensive but so far, proved their effectiveness and reliability (2 weeks in). No regrets. Thanks in advance.