Absolutely love this single, and the B-side is great too. Duffy has an incredible voice, a bit bluesy, or almost country sounding, and there's a definite air of the sixties to 'Rockferry'. Occasionally sounds like she's channeling Eva Cassidy, but rockier. So difficult to describe her! As distinctive and hard to categorise as Amy Winehouse (who I also love).
Word to the wise, if vinyl isn't an option for you, both the A and B-sides are available from a fruit-related download store! A brief surf of the internet will also lead you to a sample for a third song (Warwick Avenue), and full-length (free) download of another (Breaking My Own Heart). (Can't be too detailed due to amazon review rules).
All in all, it's definitely whetted my appetite for the album. Can't wait!