I have now many two Poppy's from Cinnamon Daisy, one as a dress with thicker straps and one as a blouse with sleeves.
I don't like elastic around my upper arms so I left it out to make more of a flutter sleeve and I am in love with how it turned out.
The instructions are fantastic, and the fitting advice is top notch. I needed to take a little wedge in from the upper bust in between the straps and underarm, as well as raising the upper bust and lowering the under bust for a bit more room. I might add a little more height to the upper bust next time for a little more modesty.