Very sturdy; attractive & plush; easy to assemble.  One improvement could be made.  The little "house" in the center is hard to access.  It would be more fun if a cat could get into it from above also.  As it is, the little platform below it is the only way to get to it.  That means the cat has to be directly in front of it to jump up and in.  But the cat can only jump straight down to get out.  Not much fun.