I buy this mount after read the review and be a little edgy about it because of the `` one star '' review i read that say it might just drop from the ceiling ... well before i hang my projector from it I actually grab onto it and hang with the full 140LBS of MY BODY WEIGHT and it slip about 1\/4 '' and then CAUGHT . I notice that if you turn the slide height adjustment bar upside down it will slip off so make sure you put that bar on the right way -lrb- try it both way , the right one will be obvious -rrb- if you install it correctly you really cant beat this for the money . it be a must that you be somewhat mechanically incline . . if you unsure , have a friend on hand for second opinion and to help you hold everything steady . once its up its easy to make adjustment and it look sweet !