Great kennel. Easy to put together. One part in step one was wrong, but the pre-drilled holes make it fool proof. I was able to put most of it together by myself until the last step. Although you can’t see from the sales pictures, you can put the third door on either side you choose. The kennel itself has no bottom, so it will be open to your floor. However there is a tray that is removable that goes inside. Just making this clear so others know there is no wood bottom.  It’s fairly strong as well. We have a 5-gallon fish tank (~40 lbs) on top of it.