I searched and searched for a modern, interesting, sturdily designed cat tree withOUT carpet, that was also TALL... This tree is EVERYTHING! It arrived in perfect condition (the wood is gorgeous and sanded perfectly smooth, no splinters), was easy to assemble, and my two young cats LOVE it! They use the different levels, scratch the twine covered posts, and take turns napping in the top box...It is only big enough for one cat. If you have a large cat, they may not fit in it. My cats are only about 10 and 13 pounds. 
I believe this post will last years.