Over the years I have purchased Armakat and Molly and Friends cat trees/condos.  Amarkat was dismal and never repurchased.  Four years ago I bought two Molly and Friends condos - big, heavy, well-made.  Took nearly four years for my cats to tear the tunnel carpeting to shreds, so I got one last spring.  Just like ice cream and chocolate bars, this was as expensive, but smaller and the carpeted tunnel held up for only a few months.  Thus, I gave New Cat Condos a whirl and I am nearly as pleased with them as my cats are.  Heavy, sturdy, with the carpeting tight.