I love my Greenkids, to date, they have been the nappy to hold up the best with repeated washings etc. The elastics are still awesome, the PUL still looks great as does the velcro. The quality of them is by the far the best in my stash.

I used mine from about 12 weeks, I used prefolds with a cover prior to this as I found this to be a cheaper option than buying heaps of pocket nappies from the start - I also liked the added protection against poo explosions of a breastfed bub.
The Greenkids will fit a newborn, but are a bit bulky - if this doesn't concern you, then you'll love them; you could try a smaller insert for a trimmer fit. Overnight, not much beats a good fitted with a cover... though I have heard good things about those who use Greenkids overnight.