I don't use 2 part nappies often, but when I do my wrap of choice is always Nature Babies! Not only are they very attractive ( we have at least 3 different patterns for each of my children and I'm tempted by several more!)but I can never fault their performance.
Time and again I find this fantastic on containment and fit. The containment issue can be tricky to solve, especially with a breastfed newborn who poos often, but this wrap never lets me down. I can't always say the same for the nappy underneath it so knowing I have a backup is great. The leg gussets are snug and the many popper options lets you make it secure on a variety of shapes and sizes. I love them on my toddler too as they don't feel bulky under her clothes, or stiff like some other wraps can be. I also love letting her loose with just a nappy on when she's wearing these wraps as they're so cute!
I have been trialling a velcro version, which I prefer over poppers, but on the whole I find the poppers give a better fit in this case.