Thai operates multiple versions of the 747, so be sure to check the seat map carefully before selecting your seat.
This older version is used mostly on flights to and from European destinations and does not feature power ports or first-class sleeping pods, as the newer 747-400 (744) does.
The Upper Deck has limited overhead bin space. A standard roll-aboard does not fit in the overhead bin.
All C seats in Economy Class have an entertainment box under the seat, reducing legroom.