Using this with a Korg EMX which is somewhat heavy, but it is stable enough for that. The only source of wobble is from where the "laptop" plate is attached to the tilt joint, which is rather silly. They are welded together in two spots, which is obviously not as stable as four welds would be, which is an odd choice. Would have liked some cable management built in to the arm as well, but some Velcro strips can do the trick too. Other than that, it is good for the price.