Nee - I would be reluctant to get a whole pile of nappies of the one brand - simply because they may not suit your child. And the resale on them wouldn't be that great because they aren't one of the well known, and well respected ones you know? I bought heaps of different types and brands because I didn't know what would suit my child. Even when they are here you don't know what will suit them, cos inevitably they change their shape throughout babyhood into toddlerhood!

But in answer to your question - I think the happy babes ones are microfibre, I remember looking at them once and thinking that they were remarkably like a Bumg - so I would assume the inserts would be quite like them too. If they are microfibre, they will dry overnight if you hang them inside - maybe a couple of hours outside in the sun. You wouldn't be able to use just microfibre at night though, unless you had an extremely light wetter.

Oh - and most AIO's are pretty trim. I've never had a problem with any of mine wearing clothes over their fluffy butts.