Hi there,
maybe you should check this page:
http://www.airlinequality.com/Forum/orient_thai.htm
Best and worse about orient Thai (and all the other airlines by the way).
Anyway I traveled on these old school orient thai planes round trip Hong Kong - Phuket for the chinese new year and it was definitely all right. On the way there the plane departed and arrived on time, no major thing, actually they are so ghetto and broke that I think they try harder with the little they have, and was kind of nice.
On the way back, something like 10 minutes late, but again, nothing special.
Yes the plane wasn't brand new, but it managed to fly us safely so I think that's what it's supposed to do.
On these very short flights to bangkok or Phuket, I don't think it really matters anyway if you get the best service or food.
They do have a bad reputation, and seems like the often suck in some way, but sounds like anybody can get over it, and just enjoy your trip, and don't worry they are still much better than Aeroflot or others.
Cheers