Although there is no such a thing as the 'best mattress' in general terms mattresses are essential to your health. Something that is best for your neighbor may not be best for you - or even for your others, which makes your choice of mattress even tougher.
Remember, how comfortable your bed is, will decide how well you sleep at night majorly. So you better ensure you know exactly what you're looking for when you're all set to purchase a mattress.