It was not difficult to get into my home after removal from the box although a neighbor did help me get it up the 5 stairs.    Supposed to be 44 pounds, but I think it's considerably lighter.  Before I even screwed in the top level, which is the only thing that requires assembly, one of my cats was on it.  They seem very happy and each has a level on which to rest.   It appears well made, doesn't tip over at all plus the price was definitely right.    I woke Aidan up from his sleep on level 2, and he began to jump off as you see in the photo.