Easy to assemble; I did it by myself in about an hour (I wasn't paying attention to the time). The pieces are very well made and it looks and feels very durable.  I was pleasantly surprised at how soft the covering is. It is a thick faux fur, not the rough carpet that some cat towers have. My rowdy young cat L-O-V-E-S it. He was attacking it and playing in it when I only had the bottom section put together. He loves scratching the posts, which is one of the main reasons that I bought it--to keep him from scratching the furniture. Huge! Higher than my head, which is what it said it was. Exactly what I wanted.