The one-piece glass panels provide a visual clarity and light penetration most desirable, especially in low light areas that get a lot of cloud cover or misty days, like the coastlines. It does have a shade cloth available for those extra sunny days. Two automatic roof windows keep the air circulating and control temperatures. The rain gutters keep excess rainfall from undercutting your foundation. With all the included features, you actually save money by not having to purchase a base kit, etc., separately.