First off, I've never noticed any difference whatsover in the legroom for rows 12-15 on the 777. And the seatguru.com note that row 14 doesn't have a window is just plain wrong. I've sat in row 14 several times and looked out that window every one of them.

I've always wanted to try 11A or 11J. I suspect that there is enough leg room that unless the person in 11B or 11H has the leg rest of that seat fully extended I should be able to get in and out without any problems. If that's true, then those seats might just be the best ones on the plane and maybe even as good as 15A/15H on a UA 744. But every time I've tried to get that seat the 777 was replaced with something else by flight time.