I'm using it. And not only does it do "as advertised" it has increased my average hash rate from 6.3 to 6.7 Kh/s. I'm running Claymore 12.6  with three 7990's, three R9-295X2's, three Radeon Pro Duo 12gb, and six RX-580's. My rigs were all relatively stable before I found this, but I was still having occasional issues with Claymore hanging. This resolved that. I also like the auto reboot every two days.

I give this five out of five stars!