This tower assembled quickly and is *very* sturdy and well made. The carpet and sisal wrapped poles look like they will stand up to wear. In theory, this looks like a great cat climber.

However, the space between platforms is a tight fit for my 3 adult cats, two of which are older.  To get to the top unit they have to sit on the small platform in the base, go though the hole, twist and squeeze onto the side platform, jump onto the small platform that has the box, then step onto the box to reach the uppermost platforms. They do not seem to like all the squirming into position to get to the next level.

They have each tried it out once, but now pretty much just ignore it, even though it is by a window and they love sitting on high places.  I will try more catnip on it, and adding a small staircase unit beside it to make it easier to climb from the outside. But I wish I had chosen a different configuration.