Tag #premium 1 post tagged premium. ← All topics comparisons Herman Miller Flo Plus vs Humanscale M2.1 vs Ergotron LX: Premium Single-Monitor Arms The three premium single-monitor arms most knowledge workers consider — Herman Miller Flo Plus, Humanscale M2.1, and Ergotron LX. We test joint smoothness, sag over time, and which arm to spend extra for. May 10, 2026