are pack n plays comfortable to sleep in?

Taylor • 22. 2 Cats & Ollie 💜
Soo all my family said to just use this as a crib for now but it seems like after I put this together that the mattress isn't very soft it's like hard -ish? Do babies need more support than that? Can I buy anything to make this more comfortable ? Or am I over reacting and this is perfectly okay to sleep in?