
Second Son thinks so, too.
I was lucky enough to win a $25 gift certificate to Ecological Babies thanks to the Knickernappies blog.
I used my certificate to buy a Thirsties Duo Wrap cover in size 2 for Second Son in the snazzy cool stripes. I had a little of the gift certificate left over, though, so splurged a few of my own dollars to try out the Duo Diaper.

I'm not sure what he weighs now, but you can see we're using it snapped down on the top snaps. There's still room to unsnap it all the way. Since he's already wearing our biggest fitted diapers, I think this should fit him for quite a while. (You wouldn't use a fitted diaper with the Duo Diaper. I'm just making a comparison for size purposes.)
The diaper has a sleeve -- it's like a pocket open at both ends. The inner liner is microfleece so it's nice and soft against Second Son's skin. The cute colored outer layer is waterproof (of course). After washing, just tuck the inserts into the sleeve. Then it's ready to put onto the baby, as easy as a disposable (and so much cuter!).
Two inserts are included with the diaper. I have been using them together successfully. If Second Son were smaller, I'd be tempted to try it with just one of them for a trimmer diaper, but in my experience the extra absorbancy is a good thing for him.

Check out those chubby thighs!
This diaper has never leaked. I like to use it first thing in the morning when Second Son often makes a messy diaper.
I always remove the inserts before putting the diaper in the pail. My low water washing machine probably wouldn't agitate it out. Since it's a sleeve instead of a complete pocket, I can pull on the end that's least messy.

Because I received this Thirsties Duo Diaper from Ecological Babies, the links above are all to that store. If you prefer, you can find them at Cloth Diaper Outlet as well with my associate link. If you are in need of any cloth diapers, I highly recommend these. In fact, I'd be tempted to buy a whole stash of them myself, if I didn't already have a whole stash of diapers.