My cats love this perch! They can sit and watch the birds and rabbits each morning, and an occasional coyote before heading off for the first of many daytime naps! 
My only complaint is the base is a rather large square, which I didn't notice when I ordered the perch. I had a similar perch some years ago, but it had an oblong base and didn't require as much "floor" space as this perch does. Thus the four stars. Otherwise it's a big hit!!