I thought I would be more impressed with these (bought two, to protect the front corners of a new couch).  They really are TALL!... which is good.  The quality is not so very great though.  The "base" is two pieces of particle board that you connect together with wooden pegs, and then bolt onto the bottom of the post.  Except, the two pieces of base were very different shades/colors in one of my packages, so its super obvious that this is made with multiple pieces of particle board, AND, the edges don't line up... (pre-drilled screw holes in the base determine this).  The sisal also seems REALLY loose on one of mine, so we'll see how that holds up.  Not impressed with the quality.