Very bad quality, second day owning it, I leaned on the left arm when I was getting up and it made a breaking sounds and the arm insides sunk. Since the part comes pre-assembled I can not even see exactly what broken inside. I though maybe it was just me doing something wrong, same day at night the same thing happened to my wife on a different part of the arm... very disappointed with this product. Btw in case you are wondering I weight 155 pounds.