Helen, if you want a good night's sleep, then maybe don't have another baby? If elvis gets used to this rocking chairs/beds your creating a rode for your own back. Personally I've never used one but like anything, if you take it away it might unsettle the baby, like ocean - elvis will be shipped into his own room at 5 monthsI would worry if I had a good nights sleep with a newborn I worry if I get 4 hours now 5 months on