I love Nature Babycare diapers. I used them with my first daughter and now with my youngest. Neither ever had a diaper rash, nor leaked. I've heard so many horror stories about people waking up and their kid is soaked, and the crib is a mess. (crossing my fingers and knocking on wood) But I have not once experienced that. I also like that the packaging is recyclable.
I love, love, love them!
Another product I've found to be a life saver (especially for those breast feeding Mommies) is Mother Love Nipple Cream.
This stuff is WAY better than the Lanisoh lanolin. It's all natural, and I would highly recommend it.