They're pretty good. I got three small and one medium of the original ones. They've just brought out an improved design, hence the original ones being on sale. I remember reading that most babies were supposed to fit small to medium right thru to TT, but my DS is just about too big for the smalls now. Mind you, he's got chubby legs and had a pretty serious growth spurt recently. They're not as "finished" as the BumGenius or some other pocket nappies, but they're SO easy to use and the inserts really do come out in the wash. I'm tempted to get some more of the ones on sale in med/large, but "new and improved" is tempting too...