Most sofa styles are broken down into two types, traditional or modern. One of these styles will definitely fit into the overall theme of your home, and the other won’t. Most people keep their sofas for a period between 5 to 8 years. When my husband and I bought our last sofa we chose a modern sofa bed for several reasons. One is that we knew that we’d shortly be moving to another state and that family would be coming to visit and need a place to stay. Another reason is that we got a fantastic buy on our sofa bed. It’s very comfortable to sit on, and it has a very comfortable mattress for our family when they visit.