I bought the scratch "tree" for my two baby cats (9.5 weeks old) the scratching post is extremely easy to assemble (less than 2 minutes), is stable and is perfect for the size of kittens, they can stretch, scratch and lie down comfortably on the tree. I'll only use it to the little ones are a few months old and then buy a larger, I recommend to put the small scratching post on a table, then you can enjoy the view. Stable is the scratching post in any case, my dog (62kg) is already running short after assembly, however, is not tree fell over and everything is secure. Sisal is not stapled :)