I've been using this monitor stand for over a year and have found it really robust and stable for holding a 34" ultrawide monitor. A major advantage of this stand is having so many different arm attachments available that really help in freeing up space on your desk.
My only real issue with the stand was the C-clamp mount design. The handle for tightening the mount to the desk is fairly large and it was obstructed by my Omnidesk cable management bar, preventing me from fully securing it to the desk. I resolved it by cutting and sanding the handle slightly which allowed me to fix it properly to the desk. Most likely not an issue for most people but definitely something to consider.