Small home, no monitor. I did use it then one night forgot to turn it on and DS was just as loud when he woke up. They have lights on and make it harder for me to sleep with LEDs in my face.

At my mum's: big house, use the monitor. Only Sneakyboy (yes, he did turn superhero on this occasion) gets up and turns it off then plays in his bedroom so it's not always all it's cracked up to be.