Hi, I am going to staart to put my dd to bed before me and will use out tommee tippee baby monitor- it has a flat hard motion sensor Im sure they have to lie on- now she will be in a cot. Does it go under the sheet or mattress? Are they any good?
It goes under the mattress. Make sure the wire comes out dead straight. Ours was fine until about 10 months when the Boy got a bit eager to climb, then it would go off every night because it couldn't sense him.
Worth it for peace of mind in the first few months though.