I use the reader with the SanDisk Extreme Pro SDXC, 128 GB, U3, UHS-II, V90 and Kingston Canvas React Plus SDXC 128GB SD cards. I have two of these readers and they work without any problems.

It's a bit old and only supports USB 3.0 Gen1 with a theoretical 600 Mbps (in practice around 400 Mbps). The device should therefore support the required 170 to 200 Mbps without any problems if the host (PC, notebook, etc.) also manages this.

Yep. Tested it above 300mbs, no problem