It doesn't use the wide screen format correctly. Too much empty space. It's better then the Kindle, but it still a update away from looking great.
not sure what you mean, but I tilt mine into portrait. What they should do in portrait mode, since the pages are formatted for a 4:3 aspect ratio, is expand the menus and page controls in the upper and lower margins automatically to fill that space and keep the formatting intact. This could show a big advantage of the Surface by using that space while maintaining the fidelity of the original content.
My only real complaint is I redeemed the two codes for books that came in the Surface quick start booklet but the Rolling Stone special edition won't download to the Nook and when I look at it on the PC it says you cant view it there either.