Well, I guess that depends on what sort of job you are applying for. If you want to focus on how it works, apply for UX/IxD positions and bring a portfolio that demonstrates you can think in those terms. If you're more interested in working on the visual aspects of design, e.g. how it looks, you need to demonstrate polish. I got hired just fine without a single pixel-perfect design in my portfolio. Personally, I wouldn't want to work for someone who only cares about what it looks like anyway.