I have flown on it before, long haul to San Francisco. I found it much quieter than the 747, and the line for the toilets not so long, nor the wait for food so long. Generally, a much better experience than the 747 for long haul. But, one thing I didn't like on the 777 was that while my wife and I sat next to each other, we couldn't lift the arm rest and stow it between the seats between us! It raised to only a 50 degree ish angle, so it was permanently between us, meaning we couldn't expand out of the confines of the armrests. Not the most comfortable arrangement. I'm not sure if that's for all seats, or just ours in that particular location of the aircraft.
What is it you hear about the seat arrangement not being the best? They are almost identical to the 747 minus the extra seat in the middle
http://www.airnewzealand.co.nz/on-the-plan...0-new-popup.htm