Feature short list:

Unfortunately only one Ethernet port.
Unfortunately the Ethernet port is 100Mbps.

It looks like is using at least two streams of 54Mbps. With one TCP connection, rates are around 50Mbps. With two ore more TCP connections, rates are going up to 95Mbps.
It should be hacked and, if there are more than two streams, Ethernet chip must be upgraded to Gbit.
The manual channel setting is sometimes faulty.
Inside the box, there are 4 antennas. There are 3 more places for 3 Ethernet ports, the Ethernet connectors, transformers, few SMD condenser and resistors missing.

The good things: the connection IS stable (as in like wire stable).
The device goes through 3 walls. In the same scenario, any tested 2.4 router (on an unshared radio channel) was not able to offer the same performance.
The ping times are consistent (exactly 5ms).
The devices are hardware identical, so, they can be configured as AP or SA, as needed.
Tested as AP paired with a CISCO AE2500 USB WIFI stick showed the same 95Mbps sustained rates (through one brick wall plus other wood/metal obstacles).
I’ve been using the bridge for 6+ months for my home Internet connection, to check reliability. No reset needed, no “blackout” type problem always meeting with 2.4Ghz equipment.

Conclusion: this is the first WIFI device behaving reliable I have ever seen. Preview dual band WIFI routers (Linksys and other) are way lower on reliability and ability to go through walls.