Excellent
Purchased in October 2022...
Tested with iperf3, i.e. 9.8 Gb/s full duplex.
In fact, I only use one of the 2 ports, because 10 Gb/s is already very fast.
Even with teaming, given the network infrastructure, there's no way of going faster than 10 GB/s. Or you have to set up failover.
Make sure you get the driver from QNAP.