The airline as a whole is all right, definitely lacking when compared to Emirates, Gulf Air, and Qatar but pleasant enough to fly with. I travel a lot to Kuwait and have ended up on them from time to time. The service is alright if not good at times. The seats are comfortable and they have PTV's in every seat on the A340's and 777's which is an added bonus. Oh and in case you don't know, Kuwait Airways does not serve alcohol, this seems to bother a lot of people for some reason, so I thought I should quickly mention it if you did not already know about it.
The airport is decent, not too big, but definitely comfortable when compared to some of the airports around the world.
I have one trip report posted on this site, but it was a Business Class flight from Bombay to Kuwait. I hope it helps you in one way or another.