Marvy is the cheapest way into pocket springs. It is only 20 cm tall, so it is slimmer than most mattresses, but the springs inside really are pocketed, not connected springs at a lower price.

So if two of you share the bed and your budget is limited, this is better than any connected-spring mattress at the same price, because it isolates motion.

It flips, so it lasts longer.

If your bed is high or you like a thick mattress, 20 cm will feel low. Look at Victoria at 25 cm.