The most exciting things in life, we are told, are measured not by the kilo, but the gram. Is that the case with Sony's Xperia U? The runt of the company's mid-year litter has an unspectacular camera, adequate internals and a middling five-hour battery life, and yet somehow, it's more than the sum of its parts. Combine that with the sheer charm of the unit, and you can't discount it as just another unexciting Sony phone. You've had nearly half a year to live cheek-by-jowl with this handset, so why not tell us what you love, what you loathe and what you'd change?