I have 3 of them, they are a good fit on my average 5 and a bit kilo 11 week old.
I have a couple with black microfleece inside that from the first wash picked up a whole lot of fluff that i have not been able to get rid of, also the place that they open to stuff is in the front about 2/3's of the way up the nappy and often gets a lot of poo there and can be a bit messy getting the inserts out