I had to return them because there wasn't good instructions to assembling them, I felt my way through .. then my monitors (Yamaha HS7) with the isolation pads positioned for the monitors to raise up from the back made me uncomfortable because the stands did not seem sturdy enough to support my monitors

Way too risky to place any kind of monitor on these, let alone the expensive monitors most of us have.

I would never leave any kind of monitor on these for fear the upright is going to bend over enough to let the monitor slide right off, and the monitors are well under the rated weight limit