Been using these since about 7 months - started with size S and just moved up to M at about 10 months, but 14 month old (20 lbs) can still wear both (I love that they are adjustable). We have 5 in our stash now that she wears most of the day (disposables overnight). Super soft and cozy, very easy to put on and adjust. A bit of a learning curve for our daughter's daycare as they think if they are wet they are dirty - but 9 times out of 10 there's no bad smell and the moisture wicks away. I think the extra work cleaning them (after a BM that misses the trifold) is worth it for a reusable, plastic-free diaper. I lanolize every 1-2 weeks when I feel them not being as water-resistant, which is easy enough. They do stain and get grubby-looking in my experience but that's because of the natural color. I don't mind as it fits with the overall aesthetic of having a baby... :)
