I have done KE
on that route a couple of years back when they had the 744. Service is good. Food is excellent. You'll enjoy your ride. I believe seating is 2-5-2 (at least that's what it was on a 773 on the BKK
-SEL sector back then), and when I flew them there were no personal seat back entertainment sets aboard the 744, 773, or the A333. Not sure if the 772 is any different, or if things have changed since then. But who needs IFE anyway?
I am sure you'll enjoy it with or without it.
I've flown on 9V-SPK.