We really wanted a sofa but just didn't have room for one as it was. We were sitting on the edge of the bed or just the one seat at the dinette in order to watch tv and even bringing in a folding chair. After looking at jackknife sofas in other units, we found this one. Took a while to actually find someone to sell it to us because the manufacturer (Keystone) said said they couldn't. I removed the existing base (storage) at the end of the bed and built a new one then mounted the sofa. Now we have comfortable seating to watch tv and the sofa folds flat for sleeping. Still working on a mattress but we're pretty happy how it turned out.