Ordered the small size for a cat. Easy to assemble - took about 12 hour because I was watching tv at the same time. Colors are nice though the trim around door is so dark green almost black. Rest of trim kind of dark emerald. Light tan siding. Put an already used pet blanket inside to entice pet in. I sprayed a squirt of my perfume inside -this can help too. 4 corners open with small triangle for venting. Not the best idea if you are trying to keep pet warm for winter, though house is somewhat insulated with air pockets in between panel pieces. Door is a little big for a cat but will fashion a swinging door for it. Sharp looking. Would buy again. Looks easy to clean and thats why bought it because the strays I house like to mark everything. Dont buy a wood house if you have this problem too. This is a good solution for that - not made of wood! (The house on the right in my pic is hand made by my dad and is heated)