If you are buying a brand new one you really don't need to order the clear door. The new ones are not a solid door but you can see in them through the large viewing door, not as well as the plexiglass door but good enough. I bought two new sprotsman this spring and I love them. I have 7 of them now, they really are not as big as you might think, about 2 ft. wide, 3 ft. tall and around 4 ft. long. They are excellent incubators and I don't think you can go wrong getting one.