Yes, I flew on a Cathay Pacific 777-300 from Nagoya to Hong Kong last spring. The aircraft was just like any other 777 except it was very...long
. I was the first one on the plane and was able to look down the aisle all the way from the boarding door to the back of the a/c. Because it is bigger than a 777-200, the take-off roll did not seem like it had as much 'power' to it, but nevertheless any 777 is an inherently powerful plane and it was a very solid ride.