I bought a birth to potty bundle of this nappy whilst I was pregnant and when I started using them was extremely disappointed. My daughter was very slim in the bottom and thighs and even though the guarantee was that this nappy would suit 'from the smallest of newborn to the chunkiest of toddlers' it did NOT. I have continued to try this nappy intermittently over the past 6-8 months as my daughter has grown but I have had continual leaking problems.
I contacted Lollipop (Adviser Heidi) and after a trial of the super softee nappy have been converted back to reusable nappies.
I have given my Pop n gro nappies to a friend to use on her more 'solid' baby and she has had no leaking problems and speaks highly of them.
My advised would be try different types/style of reusable nappies to ensure the best fit for your baby before buying a birth to potty pack.
After always using two-part nappies on our first 2 children I tried this nappy on our 3rd and loved it! Easy to use, very reliable, easy to adjust level of absorbency and quick to dry - couldn't want anything else from a nappy! And relative to some other brands of nappies, a great price!