Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sturdy, adjustable and easy to install

The shaft length is adjustable.Lots of adjustment screws to fine tune position of the projector after it has been screwed to the posts.Only gotcha is that it comes with 4 mounting legs, but only three 3" extenders. Using just the 3 that were provided, I could not mount on the four posts of my projector, even though the max distance between any two posts on my projector is 10.5 (within the specs for this kit).However, once I contacted the seller, they were quick to mail me the extra extender. All set now.