Or you can do both. Sure, the mattress might only marginally increase your quality of sleep, but if the price exceeds the usefulness you get out of it, I'm not

Or you can do both. Sure, the mattress might only marginally increase your quality of sleep, but if the price exceeds the usefulness you get out of it, I'm not sure what the issue is. We spend a third of our time sleeping, after all. Might as well make the most of it.