Can anyone tell me if the Moby D is worth the extra money? I'm planning to use one for ds2 due end of July, at least for the first 6 months, but probably not past a year I reckon. The less-stretchy fabric panel across the front of the Moby D seems quite a good idea if it's true that some people find the normal one too stretchy....? The silk ones look lovely but isn't it impossible to get baby sick off them?