Sturdy build and solid wood throughout including the scratch posts. Tree does not wobble although a well built attachment is include for fitting to the wall if you need to. Untreated wood is smooth and well finished and parts fit together easily. I would expect this tree to last a long time. Only criticism is that for older cats the drop between the second shelf and bottom is too steep and the space on top of the den too narrow for them to jump down safely. Really needs an extra shelf.