Did anyone put your newborn or infant onto a normal mattress to sleep instead of a baby cot? What do you think of using mattress because it seems more practical that way.

Lol i had a co sleeper and i had a baby cot, both never used in the end. Initially used the baby cot and baby slept on his own. Well he had his own room. After which i moved to a smaller flat and had to co sleep. Till date he sleeps with us and on our mattress.