I have yet to fly it - made the STUPID mistake of flying economy last time, which I will never do again.

As far as I can tell, on the LAX-BKK route, "Business" = Thai's "Royal Orchid" -- they have Royal Silk, Premium Economy and Economy. I was unable to find a way to book Premium Economy.

Here's what Thai's website has to say:

"On board THAI flights, Royal Silk Class fliers enjoy segregated cabins with two-abreast seating. On long-haul flights, newly installed shell seats offer 60 inches (five feet) of stretch-out space, with 170 degrees of recline for sleeping. Each electrically controlled seat is equipped with a telephone and laptop power point. The interactive Audio Visual On Demand entertainment system offers hundreds of channels, for movies, music, information and games."