[header] How to buy a sofa bed [title] The first thing to determine is how you're going to use it. [step] Most manufacturers emphasize either sitting comfort or sleeping comfort, but very few consider both. So it's important to think about whether you want it primarily for use as a sofa or a bed. 
A sofa bed is always a compromise; it is never the best sofa or the best bed available. [title] Have an idea of what you're willing to pay before you go shopping.