I'm probably not much help, but bought bum genius AIO organics to use. I had my baby 12 days ago, and am currently using disposables as they are a bit big, and she goes through sooo many nappies!
I'm putting her on the potty at change times, and think I'll start her in her BG's next week as she has just hit the 4kg mark, and we're using less nappies with the potty experiment!
I think flat cloth nappies are probably best for newborns, but I never bought pins/snappies, so am just waiting for BG's to fit... Also saving myself some washing as I ended up having c-section so am still a bit sore.