I haven't tried a Baba sling but I have a Bubba Moe and I *looove* it! One thing I do have to watch with DD2 (at around 9kgs) is that if worn in certain positions for long periods of time, it can put a bit of strain on my neck and shoulders... but that's easily fixed by popping her up on my hip rather than laying bunched up in it like she does when she's napping. I agree with AliBaby, maybe just wait till bubs is born and you can try them out (or borrow a friend's bub hehehe). I assume most slings that are designed similar to Bubba Moes will have the same problem when it comes to straining your shoulders, so just keep that in mind I've heard nothing but good things about Ergo carriers, I just don't have a local stockist so bought a Bubba Moe when I saw it at my local baby store