It can work brilliantly, and in some ways I think an instant friend can be more fun for your baby than sole care (plus learning early about How To Share!). Agree with all the points above, and I'd add to some of them to say - Write everything down in a contract between you. Not as crazy as that sounds, it's good to have everything clarified and agreed. - If something changes (eg someone has another baby) discuss what the changes will mean and re-contract. Worth the trouble. - Holiday dates cause the most trouble and strife - if everyone can book their holidays with as much notice as possible, that is immensely helpful - Talk over any issues you may have as soon as they arrive to get them resolved - When picking a family make sure they have similar ideas about discipline, nutrition, treats, naptime etc. to yours. Although, you'll find you'll all have to adapt to what your nanny does! Try nannyshare.co.uk to find a local family and good luck!