i did the 787 r/t bkk-sgn the other day. sat in 42F and 31F (bulkhead). 31F didn't have much legroom so best to avoid that row. 31C and and 31H were the worst seats i've seen on an airplane. you are literally in the aisle, no real bulkhead in front of those two seats. 42F was fine but i'm not sure i believe seatguru when they say the seat width is 18 inches. sure felt tight to me and there was no one sitting next to me. and i'm not big.