This cat tree is very sturdy, more so than I was expecting. It was super easy to set up, as you only have to attach the top level. The carpeting is very nicely done. The only minor issue I have and really can't say it is an issue. I have two cats, the one cat can't seem to get down from the top with out flipping over backwards, trying to get the the second level.  The other cat doesn't have an issue.  However do not let that deter your from buying this because my cats are extremely long.  It could just be that cat. My cats each weigh 11 pounds and have no problem laying and curling up in them. The inside of the beds are about 15 inches across. Very sturdy and would recommend.