Like the topic says, my current long haul flight fligt from YMML to KLAX (expected to be 16.5 hours) is going well. I only have about 7.5 hours left to go and it's flying as steady as a rock. I've never had any major problems with long haul flights, except for the occasional FSX CTD (this can happen to any addon aircraft I have that is capable of an 6+ hour flight, and not just the CS 777).
On the takeoff, it took a while to reach V1, VR and V2 (I thought for a while I might not have enough runway :o). The climb was nice and it never exceeded 5000 fpm. It took more than 3.5 minutes to reach 10000 feet, when it usually took about 2 minutes to reach it before. It was a bit unstable turning from HORSH to ALBAK (YMML DOSEL8.16 SID), and again on the turn from ALBAK to CHIMU, but no where near as bad. I think my MS Sidewinder FF2 joystick plays a part in this because as soon as I disable the joystick (CTRL+K), it stops being so harsh (I did this midway through the turn towards CHIMU. Maybe I should buy a new joystick. :-/

Anyway. It's going extremely well and all I have to do now is wait until it reaches the T/D. Who knows, maybe I'll pause it and go to bed. It's now 9:30am and I've been up all night doing a lot of testing on the 777, before starting this long haul flight. :o

On my next long haul flight, I plan to do a longer one in the 777-200LR. I just need to pick what flight I'll do that is a fair bit longer than the current 6989nm flight. :D

[edit]I forgot to say that I did not use a reduced thrust takeoff, nor did I switch the thrust to CLB in CDU. I did notice that the N2 indicators went RED briefly during the climb. It went fully on near the T/C (for about 30 seconds)[/edit]