Arrived in two boxes. Instructions were inaccurate but I figured out the final steps on my own. Easy assembly.  I have a tunnel connected from my through-the-wall cat door to the cattery and so they have 24 hr. access to the outdoors. Product is sturdy enough without being too heavy. I can move it around the deck if need be; it slides. I have covered the screen part in clear vinyl for the winter to keep snow out. The unit faces south so they get sun into the enclosed part. I found one of the cats asleep in the cabin part! The unit is attractive enough. I added a clasp to keep the interior door open.