Like everyone else, I don't like them.

I had both DDs in greenkids and absolutely love them, but I do find them a little big on a newborn. This time around I have a little stay of newborn sized nappies to try including itti bittis, cheeky butts and one whose name I've completey forgotten (starts with a "K") - sorry!
RE GK's... I agree GKs are too big for a newborn, they fit DD1 from about 2 months though.