I bought two of the goCoax adapters and the performance is fantastic. We have AT&T Fiber 1 Gbps service.
Here's the network layout:
- Basic context: two bedroom condo
- The fiber drop is at the entertainment center nook in the living room. So the AT&T ONT is there, as well as their provided wireless router, the BGW210-700 – not sure why they provide it but it seems to be required. Maybe it's a combo router/modem gateway? (Though I thought the ONT was the equivalent of a modem...)
- goCoax adapter #1 is plugged into the AT&T router via Cat 6* and the wall via coax.
- goCoax adapter #2 is in the spare bedroom/office, plugged into a TP-Link 4-port switch via Cat 6, and the wall via coax.
- Desktop PC is plugged into that switch, as is the printer, second TV, and second Blu-ray player.
Speed at my desktop PC in the spare bedroom is consistently 900+ Mbps down, and 920+ Mbps up.
Interesting tidbit: I have yet to find my coax point of entry (POE). I've looked all over and can't find it. This being a condo makes it more complicated. So the above performance is with me still not having found the POE, no MoCA filter installed, and no MoCA-compatible replacement splitter. There must be a splitter at the POE, and it's presumably MoCA-compatible (passes up to 2,000 MHz signals) since MoCA is working. I was ready to install both a filter and a replacement splitter, but it proved unnecessary. Funnily enough, I only discovered that we had fiber because I was looking for the coax POE and stumbled on a suspicious, blank wall plate – I had no idea AT&T Fiber was available and already physically installed (!)
* I habitually buy and use Cat 6 at this point, even for patch cables, because it's so cheap to do so. Cat 6 was of course unnecessary here for gigabit speeds. But it barely costs more than Cat 5e, and a few years down the road when I'm rocking 2.5GBASE-T or 10GBASE-T I want all my random pile o' Ethernet cables to be Cat 6.