Sony has finally found a way to combine a high-res touchscreen with decent performance, great battery life, and a thin and light body — that's all good, but I still want more. Much more. For $1,249 I want a computer that doesn't feel like it would break in a stiff breeze, and one without the jumpy trackpad that sometimes makes me wish for a stiff breeze. The MacBook Air succeeds because each of its parts just work, because it has few earth-shattering features but even fewer deal-breaking flaws. Sony's close, but the VAIO Pro 13 lacks the polish required to really take on the Air.
The 11-inch model is worse. The even-smaller, even-thinner body only exacerbates the build quality problems, and coupled with a touchscreen that's probably too high-res for this screen size, it just falters. Battery life is great, but performance lags a bit behind the larger counterpart — and when the 13-inch Pro is so thin and light anyway, it's hard to think of a reason to buy the 11-inch model unless you're desperately trying to save $100. If that's the case, you're probably better off just looking elsewhere, or saving another $150 and buying the 11-inch Air.