I purchased this last spring. Had a little trouble muscling the last panels but, this is one of the best purchase I have made for my cat! I foster kittens as well. All felines thoroughly enjoyed being outdoors. I love that they are safe outdoors. Construction is secure, nice sturdy roof.  I covered it for the winter and will, most likely, add some weatherproofing this year to extend the life of the product (not certain it needs it.) One shelf needs some weather proofing, however.  Highly recommend!