But The Wall Street Journal, not so much:

Surface Pro: Hefty Tablet Is a Laptop Lightweight.
(Access may require a subscription.)

A few snips:
"But unlike the first (i.e. the "regular" Surface), this new tablet is capable of running full-featured Windows 8, though at a price—in dollars, bulk and battery life."

"It's too hefty and costly and power-hungry to best the leading tablet, Apple's full-size iPad."

"It lasted just under four hours between charges—less than half the stamina of the iPad on the same test and three hours less than the Surface RT."

"...it's compromised as a laptop. You get fewer ports and less storage than on many laptops and a keyboard that can't compare with those on many laptops."

But on the plus side:
"It ran all the software I threw at it—both the new type and the old desktop type—speedily and well."

The reviewer, Walt Mossberg, has a tendency to dislike things that compete with Apple devices. (IMHO)