Built like a rock. My keyboard weighs next to nothing but I didn't want it bouncing around. I have owned older, very heavy keyboards and this would handle any of them without breaking a sweat. Neither the rubber isolation bumpers nor the height adjustment device are very intuitive but if you play with them you can get them right within ten or so minutes and the height adjustment remembers your setting. Aside from the rubber isolators, this thing would last forever and is rock steady.