My little one was in Sweet Peach fitted diapers from a week old (would have been birth but he arrived early) and I cannot say enough good things about them. The diaper service is wonderful. The diapers fit well and are easy to use. You can move up a size as baby grows, and change covers as you decide what works best for you and your baby.
If you are considering this service, do not hesitate. You will not regret it!