Annabelle, DS is 17 months so already in the 'large' size for the AIOs and the covers. So far I haven't thought far enough ahead to get AIOs or covers for the new bub. The AIO is fine, and we've even left it on for longer than the recommended 3 hrs with no signs of leakage. DH really likes it as it's pretty much just like a disposable. Takes longer to dry though.
I wouldn't call DS's legs either chubby or skinny, he's an in-betweeny!

Marcellus I'm not keen on the flats. Don't know why, they just seem like too much hard work. Although, I used to think that about MCN's too, so I'm likely to see the light there too We have a fantastic mini-hills-hoist style clothes line that we have set up in our back room for rainy days. I've found that I can dry the BBH bamboo nappies in less than 48 hours, which is pretty good.

Thanks girls for your replies so far